The easiest way to glass the fins is one side at a time. (there are ways to do both
at once, but the keels must be reverse-nailed to a mount = hassle) esp first timers.
Find a flat clean expendable surface. I use masking paper, but DO NOT use newspaper.
I like to tape the paper to the table at the corners to maintain tightness.
Lay pair of fins about 1/2 inch apart along the bases. Glass both outsides or insides.
The two keels should make a heart shape kinda.
Lay a big square of 6 ounce cloth so there is at least 1 inch safe margin around the pair.
Hint: use a 3 inch chip brush, no squeegee. use lam resin, pretty hot (wood inhibits the
cure a bit).
Brush out your resin sparingly so there are not too may drips running off the fin and down
the excess cloth. No puddles but move quick, I got to the point where I pour dollop in the
middle and work it out.
Big Hint: use your wet brush to “tack down” corners of the big square cloth to the paper
on your table. This pulls the cloth tight like a tent or a drum head. Tack down areas so
the cloth coming off the fin are exiting off the fin like you want.
Now, brush resin around the leading and trailing edges, so you have about 1/4 inch of wetted
cloth out past the wood fin. (this will act as your “dam” when doing the other side). Be clean
and try to be precise. Give time for the cloth to wet out, don’t push down and force it.
Look really closely for any pinholes in this 1/4 inch overhang. Try to brush them away as
your resin starts to thicken.
Be sure NOT to over-wet the fin panel areas as the cloth can “float” and change your foil.
I use my glassing shears (they won’t dull doing this) and trim out the fins. I start by cutting
a rough outline (paper AND cloth) then go back and get my 1/4 or 1/8 inch extension looking
the way I want.
(I DO NOT separate the two keels, the bases remain 1/2 inch apart, it makes handling easier).
Repeat the paper, taping, glass square, brush out, etc. Then, toward the end, use your
brush like a stippling tool to force bubbles out of your leading/trailing edges. A light bouncing
touch will wiggle and coax most bubbles out. I wait until the resin starts to thicken- I have
about 45 seconds to go all around the edges really before gelling starts and the brush can’t
Trimming the second side entails cutting the two fins apart using a Utility knife and trimming
flush at the base. I use my shears to get within about 1/16 inch from my final edge.
I use a high-speed (11,000 rpm) 5 inch grinder to form the final edges just right.
Now I wished I posted some build pics- I should take some! (fingers are tired)
Hope this helps,