Merganser
Stitch and glue kayak building instructions

Draft version final version has many more illustrations
And appendices covering details including hatches, seats etc.
Full instructions are available for $20.00 (75 pages) and are included with plans for $85.00.
All Rights Reserved No part of this page may be used without the permission of Shearwater Boats.
These kayaks were designed on a naval architecture program called Pro-Basic which allowed me to develop a smooth, pleasing, shape by eye and adjust it based on engineering information calculated by the program. It also provided panel shape layouts, which were used to create the pattern for cutting the plywood. I used a large plotter to draw the patterns full size so I could then trace the shape onto the plywood. These patterns are available to the home-builder.
The following is the instructions for building stitch and glue kayaks. They are arranged in order. Most steps can be accomplished in a day. Whether or not you build one of my designs, you may find them useful for building your own kayak. Photos for building the Baidarka.
Tools required include a saber-saw (hand-held jig-saw), block-plane, power sanders (belt sander, random orbital or palm sander), sanding block and sheet sandpaper, plastic squeegees, disposable bristle and foam brushes, scissors, center-punch (prick-punch or ice-pick) and of course a pencil.
You are planning to build your self a boat. How should you make it meet your needs. There are lots of options described in these instructions. The following are some pointers that will help choose among them.
Type:
Shearwater Boats has several designs to choose from. Choose among them based on looks, performance and size.
Click here for an over view of the types of Stitch and glue kayaks by Shearwater Boats. Or here to see pictures
Size:
Most importantly, choose the boat to fit you and your paddling style. If you are planning to use the boat for playing in waves or rolling you should choose a smaller boat than you would if you plan to tour. Expeditions require storage space for gear and more floatation to carry the weight. Click here for a guide choose a boat based on your height, weight and paddling style.
Cheap:
Start by using the first option of cutting the plywood i.e. Cut first, join later. This uses only two sheets of the "good stuff" (for Mergansers and 17 foot Baidarka). Bulkheads, decks etc. can be made from cheaper plywood.
While not strictly recommended, you can substitute 1/8" luan door-skin plywood for the more expensive okoume marine plywood. This plywood is pretty good stuff but is not quite as strong and may have some voids which may weaken it. However if you choose your sheets you will be able to build a good boat. You can also choose to use luan for the deck with okoume for the hull as a cost savings.
Make all your own hardware: foot braces, deck fittings, hatches and seat.
Do not skimp on the epoxy, you need its adhesive qualities and strength. Polyester resins are not up to the task.
Big feet:
The mergansers are relatively low volume boats, so large feet can be a concern. The wide version of the merganser 17 has quite a bit more foot room than the standard version, the 18 footer also has somewhat more space. The wide version will accommodate US size 12+ easily.
The foot braces described in these instructions take up some space which is needed by big feet (size 12 and up) Use commercial foot braces or better still use a block of minicell foam to make comfortable "bulkhead" foot braces. The bulkhead foot brace is not ideal if you are planning to share your boat with different size people.
Light weight:
Saving weight generally sacrifices strength.
You can substitute 3mm okoume plywood for the recommended 4mm.
You can use less or lighter weight fiberglass on the boat. You can cover only the bottom of the boat with glass, sanding it to a feather edge on the sides. You should still apply a "tape" of fiberglass over the joints on the deck and especially the hull to deck joint. You can substitute "tape" cut from 4 oz. cloth for the 9oz. tape which is recommended.
For no sacrifice in strength, select your details with care. Choose the scarfed plywood option. The bungee closed hatches should save a couple of pounds over the knob closed hatches or VCP hatches. Use arched wood or plastic deck fittings. Minimize deck rigging and use only a loop of rope or webbing for lifting points at the ends. Use plastic footbraces or bulkhead footbraces cut from minicell foam.
Rugged:
Nearly the opposite of light weight.
Use extra fiberglass. An extra layer or two on the bottom adds to the resistance to rocks. Also add a layer to the inside of the hull which protects against punctures.
Add brass rub strips to the bow and stern. I have screwed pieces of brass tubing (sawn in half lengthwise) to the bow and stern of some boats. Start at the tip of the bow (and stern) and run the strip down the bow and along the bottom for several feet.
As easy as possible:
Start by using the first option of cutting the plywood ie. Cut first, join later. This technique is easier than scarfing.
Use commercial foot braces, deck fittings and seat.
Use the bungee closed hatches or strap closed hatches.
Use the laminated plywood cockpit.
I started by buying several sheets of 4mm marine plywood from ML Condon Lumber in White Plains, NY, (914)-946-4111, one of many fine suppliers of Marine-Grade woods. They are quite close to my house. If you are close to me, I have some plywood and can give you a better dealthan Condon. Transporting thin plywood long distances is difficult and expensive. The plywood sheets were 49-1/4" by 98-1/2" (1.25m by 2.5m). Other suppliers include Boulter Plywood Corp in Somerville, Mass (617)-666-1340, Edensaw Woods, LTD.in Port Townsend, WA (800)-745-3336, Noah's in Buffalo, NY and Toronto (416)-259-7555World Panel Products, Riviera beach, Florida, 561 840 0500 or 888-836-3379 (many types of marine plywoods in stock). Many of these outfits will ship plywood to your door, some less than you can get it locally.
Other materials include thin copper wire for "stitching" the pannels together, epoxy for bonding and sealing, 3"wide fiberglass tape and 4 oz fiberglass cloth some short strips of pine and long thin strips of hardwood for the combing. I use epoxy and fiberglass from System Three Resins Inc (800)-333-5514. Other excellent suppliers include MAS-Pheonix Resins (800)-398-7556 and >West System.
Instructions for all the boats include a bill of materials. On line are the Merganser Baidarka and Eider Use these to help you estimate costs of materials.
I started on Wednesday, May 27th at 10:45am by scarfing the plywood to make pieces long enough for the boat. The plan was to scarf two full sheets and a short piece together. I actually cut the two full sheets and the partial sheet in half lengthwise so that I scarfed twice making two sheets 24-5/8" by 17' - 3 1/2". I planned to cut opposite sides of the boat together by laying these two sheets on top of each other as I sawed the panels out.
First, cut 13" of length from one sheet of plywood.
Next cut the two full sheets in half lengthwise (24-5/8" x 98-1/2") and the 13" piece to 24-5/8" x 13".
Select the best face of all the sheets and marked them "show" the back face "other". The scarf joints must be planned so that the good side shows on the entire boat.
Layout the scarf joints by marking the plywood with a line 1-1/4" (for 8:1 ratio scarf ) from the edge. Mark the sheets as follows: full sheet #1: one end on the show face; full sheet #2: one end on the show face one end on the other face; and on the other face of the 13" sheet (#3). Remember, there are two of each sheet.
Stack both sheets #1 with the show face up and the both sheets #2 with the other face up. Next adjust them so the edge of each sheet lined up with the layout mark on the one beneath. You will then have 4 sheets stacked with their ends stepped by 1-1/4". Clamp the sheets together with a board above to firmly hold them onto a work surface. Using a block plane, plane the stepped ends into a smooth ramp running from the layout line on the top sheet to the tip of the bottom sheet. Repeat the process with both sheets #2 with the show face up and the both sheets #3 with the other face up.
To glue the scarf joints, lay the sheets on a long work surface. With the show side up, set out sheets # 1,2,3 in order with plastic sheets under the joint areas so the epoxy wouldn’t stick plywood to the table. Brush epoxy onto the scarf surfaces and allowed it soak in for a while. Then mix some epoxy with wood flour and brushed that onto the scarf surfaces. Align the joints and checked that the sheets were straight. Put some staples through the joints to hold them in place. Lay a sheet of plastic over the joint and set the other plywood sheets out and epoxied them the same way. Finally, lay a sheet of plastic and some packing foam over the joint and clamped a 2x4 over the joints to hold them tight.
I did all that in one day
The next day I removed the clamps, plastic and staples to show two long, limber sheets of plywood. I cleaned up the joints a little with the belt sander. Then I transferred the pattern to the plywood and cut the panels out. Photos of cutting out panels
Tape together the templates ( 5 large sheets of paper) and check that they were straight. I then laid the template onto the plywood so that all the panels were on the plywood and thumb-tacked it down. Next use a center punch to punch through the paper to mark the plywood every 2-3" along the edges of the panels and 3/8"-1/2" from the edge on each 1 foot station line.
After marking all the panels, (5 on the pattern) remove the pattern and used a long straightedge and a pencil to mark the edges of the panels.
Then securely clamp together the two sheets of plywood with the show sides facing each other. Use some scrap to protect the plywood from the clamps. Then saw out the all the panels with your saber saw while keeping the two (port and starboard side) panels clamped together. Dress the edges with the block plane so that they were smooth and accurate to the pattern lines.
While still clamped, I drilled holes for the wire "stitches". I Drilled a 5/64" hole at each punch mark made 1/2" from the edge on the 1' station lines plus one half way between, 1/2" from the edge. This gave me holes 1/2" from the edge of all the panels every 6" (of boat length not necessarily 6" apart.) I also drilled holes 1/2" from the end of the two hull panels (#1&2) 2"- 3" apart. I drilled an extra hole at station 6 and 10.5 where the bulkheads attach.
Next, trace and cut out the bulkhead panels from the remaining sheet of plywood. I drilled holes near all the corners of the bulkheads for wire.
After unclamping the panels, bevel the edges so they would make a neat joint with their mates. Panel #1 should be beveled a lot where the keel is deeply "V"ed near the end and less toward the middle. The outer edge should be beveled more near the middle where the bottom and sides meet at an angle less at the ends. I found that a bit too much bevel was OK and allowed the panels to join tightly. Bevel all the panels with thought to the angles they met their neighbors.
The next morning, I started assembling the kayak. I permanently joined the four hull panels together and the six deck panels. I only temporarily joined the deck to the hull so that I could later work inside the boat. Photos of assembling the panels
In preparation for the next step take 4 packages of copper wire and cut the rolls in half with a pair of tin-snips to get hundreds of 2"- 3" arcs of wire.
First loosely wire together the two bottom panels (#1) along the keel line and up the ends (bow and stern).
Next, wire in the bulkheads to spread the bottom panels. Then, wire on the sides. All the wires were still only moderately tight, so, twist them tight while checking that every thing is aligned properly (make sure the bow and stern lines are vertical, not twisted).
Continue by adding the first panels of the deck with only as many wires as needed to give the kayak its shape.
Wire together the two forward deck panels before installing them and hook wires through all the holes along the edges. Next, starting at the front hook these wires into their corresponding holes loosely. This way you can get all the wires through the holes without really getting your hand into the boat (which you cannot do because of the bulkheads.) When all the wires are in place, start tightening them up.
Check that all the joints are tight and that the panels meet cleanly. Make sure that the lines of the boat are fair look for humps and valleys in along the joints. You may need to un-wire a section and take a stroke or two with your block plane for humps. Or you can loosen the wires and insert a toothpick or similar bit of wood for valleys.
When you are happy with the shape brush epoxy into the joints (except the deck to hull joint) to hold the shape while taping the seams. Avoid getting epoxy and drips onto the surface of the plywood as much as possible.
Then I separated the deck and hull so that I could tape all the seams on the inside.
Cut or untwist the wires holding the deck onto the hull.
Cut a scrap piece of plywood into a spreading tool 1-1/2" wide, 8" long with a rounded end. Sand the edges smooth.
Carefully, remove the deck and set it where you can work on it (if your space is limited just set it aside, carefully, until you have finished taping the hull).
Press the wires into the inside of the joint with a screwdriver. This is so the wires can be hidden under the epoxy fillet.
Brush epoxy to wet out the plywood 2 inches around all the joints.
Mix epoxy with wood flour to a peanut butter consistency. Mix batches of 1-2 cups as needed. Bigger batches may cure before you finish especially in hot weather.
Spread the epoxy into the joints with your spreading tool to make a fillet. Remember to filet the bulkheads to the bottom and sides. Try to be neat making an even fillet with no lumps along the edges. Where two panels meet at a shallow angle you can use a plastic squeegee to create a smooth transition between the panels. The ends of the hull are a little tricky and require the most epoxy. Use fairly thick epoxy mixture there so that the fillet stays put.
Cut fiberglass tape (9oz fiberglass cloth 3"wide) the length of each joint and lay it onto its joint. Brush unthickened epoxy on to the tape. Use the plastic squeegee to help move the epoxy around. Try to get only enough epoxy on the tape to thoroughly wet it out, (so it is clear) not so much that it drips. Squeegee any excess onto the plywood to seal it.
When the epoxy had cured, I cleaned up the outside of the boat.
First cut all the wires using flush cutting wirecutters. You will have to pull the wires up out of the epoxy in places before cutting.
Sand the surface to smooth the wires and drips. You can use a belt sander (80 grit belt) on slow speed or a sanding block. Do just a little now, get the worst of it. There is more epoxy work to do. Avoid sanding into the wood at all during this step.
Then I worked on the interior and cut the hatches. Photos of cutting the hatches
Sand the inside of both the deck and hull to remove the rough edges of the fiberglass tape and any drips and splinters. Also, sand along the upper edge of the hull (including the bulkheads) and the outer edges of the deck to give teeth to the deck to hull bond.
If you use my wooden foot-braces, now is a good time to install the rail. Pre-glue the "T" section of the foot-braces according to the instructions. Sand the rail smooth removing all sharp edges. Roughen the bottom of the rail and the inside keel area with extra course sandpaper. Round the bottom corner under the "T" to fit the fillet between the keel and the forward bulkhead. Brush the areas with thickened epoxy. Lay the rail in place and hold it to cure with a heavy weight.
If you will use a commercial foot-brace such as "Keepers" reinforce the (in)sides with an extra layer of plywood. Mark the location of the screws. Drill a 1/16" hole at the mark for the screws. Cut a piece of plywood 2-3" wide and 2-3" longer than the footbraces, smooth the edges with sandpaper. Sand the area inside the cockpit area where the foot braces will go with extra course sand paper. Brush thickened epoxy onto the pieces of plywood and the areas they will go. Center the plywood over the holes and drive a sheet-rock screw through the hole into the piece of plywood. When the epoxy cures, remove the screws. (you may wish to rub the screws with wax prior to driving them in to make them easier to remove)
If you wish to use a backrest which is supported from the deck, bond the fittings in now.
The above steps may be left until the deck is attached if you wish, although this is the easiest time to do them. The hatches, however, must be cut at this time.
Use a tape-measure to locate the approximate spot that the hatches go and apply some masking tape on which to mark the exact outline of the hatches. Using the dimensions on the plans, layout the hatch outlines onto the tape. Use the base of a quart-size varnish can to mark nice curves for the corners of the hatches.
Locate the hatches on the inside of the deck in order to install the hatch stiffeners. Mark the hatch stiffeners' locations as about 1.5" in from the forward and aft edges of the hatches. Make a template for the shape of the stiffeners from scrap plywood and cut the stiffeners themselves from hardwood according to the drawings. Bond them in place on the deck using thickened epoxy.
When the epoxy has cured prepare to cut out the hatches. Using your saber-saw cut along the lines. Neatness counts here. Start the cut on a straight section by resting the saw at an angle with the front of the saw's shoe resting on the surface and slowly rotating the blade into the wood. Carefully follow the line all way around. You may want to reposition yourself for better control as you go.
Now is the time to join the deck and hull.
Start by sanding the inside edges of the deck and hull with course sandpaper to give teeth to the epoxy joint. Also, sand the inside of the deck where the bulkheads will be.
Round the top corners of the bulkheads with a hand plane to fit the fillets on the deck.
Hook wire into the holes around the edge of the deck. Re-drill any holes that may have been filled with epoxy.
Lay the deck onto the hull and start loosely hooking the wires through the holes in the deck. When all the wires are hooked through the deck and hull, start tightening them to draw the seam closed. Press the wires into the joint with a screwdriver. (Reach through the cockpit and hatches.)
When you have the joint tightly closed, you can start the epoxy work. Lay the boat on its side. Brush epoxy into the inside of the lower joint.
Spread the thickened epoxy into the joint with your spreading tool to make a fillet. Remember to filet the bulkheads to the bottom and sides. Try to be neat making an even fillet with no lumps along the edges. Where two panels meet at a shallow angle you can use a plastic squeegee to create a smooth transition between the panels. The ends of the hull are a little tricky and require the most epoxy. Use fairly thick epoxy mixture there so that the fillet stays put.
Cut fiberglass tape (9oz fiberglass cloth 3"wide) the length of each joint and roll it up. Make the tapes that go into the bow and stern about 1 foot shorter than the joint ( you will have trouble laying anything much longer.) Soak each roll of tape in unthickened epoxy for a minute prior to applying it. Unroll the tape onto the joint and brush unthickened epoxy on it as needed. You will need to use a brush on a stick for the ends. Use the plastic squeegee to help move the epoxy around. Try to get only enough epoxy on the tape to thoroughly wet it out, (so it is clear) not so much that it drips.
Roll the boat onto the other side to work on the other seam. Work on the bulkhead to deck joints as you can reach them.
When the epoxy has cured, clip all the wires.
Then I sanded the boat and fiberglassed the outside. Photos of fiberglassing the boat
Use a belt sander or sanding block to remove drips and smooth the wire ends on the deck to hull joint then use fine (80 grit) sand paper on a palm or random orbital sander to smooth the entire boat. Sand carefully, do not over do it and sand through the first layer of the plywood. Try to get all the drips off. Put a small radius on all the joints; use a sanding block or your block plane for this.
If you want to decorate your boat with veneer inlays or sign it (assuming you are planning to varnish it) now is the time. I used birch edging (a product sold in woodworking stores to give a nice edge to plywood shelves) to make a stripe along the side of my boat. You can apply the veneer with epoxy, cyano-acrylate (super glue) or high quality contact cement. Be neat with the glue, drips and bubbles show. Sand the veneer to round any edges slightly, don't sand through the wood.
Turn the boat up side down. Lay 4oz fiberglass cloth over the entire bottom and trim it to fit. I 'glassed the entire outside of my boat with one layer. I, therefore, trimmed the fiberglass to where the deck and hull meet. I put an extra layer in small areas around the bow and stern where they are likely to get scratched in use.
Smooth the 'glass with a dry brush. If the cloth will not lay down on the bow or stern, you should make a cut in the cloth and fold it over the bow making two layers.
This next step should be done with care as it shows. Choose a warm, dry time to work. If you are working in cold or wet conditions, you may need to heat your work space. Do not use a space heater which exhausts into the room such as most kerosene heaters because they produce water vapor which can effect the epoxy. Read the epoxy manufacturer's recommendations.
Mix up about 3 cups of epoxy. Use a 2" bristle brush and a plastic squeegee to spread the epoxy into the 'glass. The 'glass should become clear as the epoxy soaks through it into the wood.. Spread the epoxy so that the 'glass is saturated but there are no drips. Brush or squeegee out any bubbles. Use the brush in a dabbing motion to fill bubbles in tough places such as the edges of veneer art. You will need to mix up more epoxy as you go...do not mix large batches because the epoxy can cure faster than you can use it especially in hot weather.
When the epoxy has cured, Cut the excess glass off with a sharp knife. Sand the surface lightly with 80 grit sandpaper to remove any sharp fuzz. Sand more along the edge where the deck layer of cloth will over lap the hull layer.
Turn the boat over and apply 'glass to the deck.
Also apply 'glass to the outside surface of the hatches.
Work on the cockpit combing. Photos of the cockpit combing
I make a combing using laminated strips as described in The Strip Wood Kayak by Nick Schade, page 97 and 116. This makes a nice looking, nautical job but can be a bit challenging to first time boat builders. Another, simpler technique is described in The KAYAK SHOP by Chris Kulsczyki, page 98. This technique uses laminated plywood.
Trim any excess 'glass from the cockpit opening. Use a rasp or course sandpaper on a scrap of wood to smooth the opening and make the edges vertical.
Cut 100 2" long pieces of 1/4" x 3/4" wood for the cockpit combing. I use 50 dark and 50 light colored pieces for fun.
Use a drop of hot-melt glue to glue each strip vertically inside the cockpit opening. I get the bottom edges of the strips just below the inside of the deck with 1-1/2" or so above the deck. Start at the back on the center line. Use a bead of Elmer's waterproof glue to glue the strips to each other. Fit the final strips by planing them to fit.
When the Elmer's dries, sand the outside of the combing with course sandpaper.
Cut 6-8 strips of 4 oz. Fiberglass 3"wide by 18" long. I try to cut these strips from the cloth diagonally so that they follow the curve of the combing better.
Brush the combing and adjacent deck with epoxy. Apply a 1/4" fillet of thickened epoxy between the combing and the deck.
Lay the fiberglass strips around the combing, and onto the deck. Saturate them with epoxy. Make the 'glass at least one layer thick, two at the front.
When the epoxy has cured, sand off any sharp edges and blend the new layers of 'glass to the deck.
Use a rasp and course sandpaper to smooth the bottom edges of the strips flush with the inside of the deck. Sand the inside of the combing smooth. Also round the bottom edge to about a 1/4" radius.
Cut 10-12 strips of 4 oz. Fiberglass 3+"wide by 18" long.
Brush the combing and adjacent inside deck with epoxy. Lay in the fiberglass, and saturate. Make at least 2 layers, 3 at the front.
When the epoxy has cured, sand off any sharp edges and blend the new layers of 'glass to the inside of the deck.
Cut five 1/8" x 3/8" x 7 foot lengths of hardwood (ash and mahogany are great) for laminating the lip.
Mark a line 1" above the deck on the outside of the combing. Cut any excess combing off 1/4" or so above that (rough cut only).
Brush a 1/2" stripe of slightly thickened epoxy onto the combing below the line. Also brush slightly thickened epoxy onto both sides of four of the strips and one side of the last strip.
Bundle the strips with the dry side of one strip out, and start clamping them to the combing. Start in the middle of the strips and the back of the combing below the line. Bend the strips onto the combing, following the line and adding clamps every 3-6 inches as needed to hold the strips smoothly against the combing. When you reach the front with one side of the strips, cut them off in a vertical plane running forward and aft. Cut the other side one strip at a time fitting the ends to make a mitered joint.
Check that the lip strips follow a smooth line and are symmetrical. Make sure their are enough clamps to hold all the strips tightly against each other and the combing.
When the epoxy has cured, remove the clamps. I replace the clamps holding the ends of the lip strips until the epoxy has cured 48 hours at 70deg or more or a week in cooler weather. Cut off any excess combing above the lip. Sand the top of the combing flush with the lip, sand the top of the lip smooth too. Round over the top-inside edge of the combing and the top and bottom edges of the lip. Sand it all smooth and saturate the wood with epoxy.
I also install "cheek-plates" next to the seat to hold me in place during bracing and rolling.
Cheek-plates are pieces of plywood epoxied into the cockpit between the deck and bottom which help hold you in place in your seat. They also help to support the backrest.
Cut the cheek-plates according to the pattern and it them in place. They will require some adjustment to fit right as all boats vary a bit. Trim them with your block plane or a coping saw.
Cut the slots for the back strap as described on the pattern.
Fillet and glass them in.
I install the lip for the hatches using scrap plywood.
Cut pieces of plywood to make a 3/4" lip around the inside of each hatch. Fit 6 separate pieces for each hatch. Make the pieces overlap the inside of the deck by 1" or so. The overlap will need to be cut to a bevel on the rear hatch sides.
Glue the plywood pieces in place using thickened epoxy.
When the epoxy has cured, sand every thing smooth.
Then seal the wood with unthickened epoxy.
I install flush deck fittings in holes I drill in the deck.
I manufacture my flush eyes prior to this step (drawings are available).
Mark the locations of the deck eyes using a tape measure from the ends of the boat and the edge of the deck. Use the locations on the plans or plan your own. Remember that these eyes may interfere with your feet or knees so locate them accordingly.
Use a hole saw to drill holes for each deck eye.
Fittings in the ends of the boat may require some filing to make them fit well into the sharply "V"-ed deck.
Brush epoxy onto the inside of the hole and the mating surface of the fitting. Add some thickened epoxy to the mating surface of the fitting and push it into the hole. Fittings in the ends of the boat can be pulled into position using a piece of wire threaded through the hole and hooked into the fitting.
Turn the fittings so the cross bar is at a good angle. Most of mine are mounted crosswise with the end ones mounted lengthwise.
I lean the boat against a tree to let me pour some epoxy into the ends.
The "end-pour" provides strength to the boat and a place to mount lifting toggles.
Balance the boat on its end while leaning it against a tree or a corner of your house (somewhere it will stay put.)
Using a narrow, deep container such as a plastic cup, mix up a runny mixture of thickened epoxy. If you have access to micro-balloon filler you can make a lighter endpour.
Pour the mixture into the end of the boat letting it fill the end for 4-6".
After one end cures, do the other end. The large lump of epoxy cures pretty quickly.
Drill 1/2" holes 4" from the ends 1/2" below the deck, through the ends of the boat for lifting toggles.
I finish sanding the boat and apply a final coat of epoxy to smooth the fiberglass.
Use 80 grit sandpaper to feather any edges of fiberglass cloth that still show and remove any sharp fuzz left over. Do the whole boat and don't forget the hatches.
Clean off the dust with a clean, dry cloth.
As before, work on a warm, dry day. Mix up about a cup of (unthickened) epoxy and squeegee it onto the boat to fill the weave of the fiberglass and wet out any exposed wood. Apply just enough epoxy, not so much that it drips. Try not to over work any of the epoxy to avoid getting dust and air bubbles mixed in.
Let the epoxy cure then sand the boat smooth. Use 80 grit sandpaper to smooth the entire boat, remove all the gloss but try not to sand into the fiberglass much.
I applied 4-6 coats of marine spar-varnish in early July.
Remove the sanding dust with a clean, dry cloth, wash the boat with warm water to remove any amine blush and then a tack-cloth or cloth dampened with brushing thinner.
Use a 2-3" foam brush to apply a thin uniform coat of varnish. Do not worry about perfection but avoid drips.
When varnish has dried, sand the boat enough to remove dust spots and (sssshhh!) drips.
Re-clean and re-varnish. Oh, by the way, you can try your boat after a coat or two of varnish.
Remember to varnish inside the cockpit, foot-braces and hatches.
If you paint, apply it the same general way. You can use thickened epoxy to better smooth the boat in the previous step. A high-build primer can help with that yacht-like finish.
Updated on January 9, 2008
by Shearwater Boats
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