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First recorded activity by BoatBanter: Feb 2007
Posts: 900
Default 2 part varnish vs. 1 part

"Bill" wrote:
Um......Voting is stupid and we should just bomb the rest of the world
into dust so that we can build cheap condos and more marinas for our
boats.


What kind of bombs should we use? I would favor nukes, they are very
cost effective and we need to reduce current inventory anyway. Might
create a long term liability for the condo/marina developers though.
OK now that we've got the mandatory OT political content out of the
way, let's talk boats!

PS w


I think i am leaning towards the Epifanes option here. I need it
hard. I'll try not o drag it on the beach but sometimes it happens,
not to mention the trailer.


Epifanes and Bristol are both good finishes. You want it hard to
resist scratching but it also has to be flexible and have excellent
adherence as the wood swells & shrinks (this is where epoxy resin has
it all over polyester for laminating stuff to wood). Any of the high-
end varnishes with UV protection and high-build formulation will do
the trick, none of them are inexpensive though. Not in the $60/qt
range, but still pricey. And since you're specifically buying it for
the UV protection, cheap varnish isn't going to do the job.



What you may consider is to do the last laminating over your wood with
a peel ply, then lay on another coat of epoxy with UV inhibitor.



This is a maybe but i really want that glassy look on the boat. I
don't know if i can get that with a peel ply with cheap varnish over
the top.


Peel ply is GREAT stuff. I used it for the first time last year on a
fairly technical prject... now I use it for almost any epoxying/
fiberglassing job; it is not expensive and it saves a lot of work. The
peel ply is a layer of porous cloth that the resin won't stick to.
Sounds great huh? You lay it over the wet lamination, roller it down,
and the resin oozes up thru the peel ply. Sounds better & better eh?
Well it improves adherence, eliminates voids & bubbles, gives you a
higher fiber/resin ratio, and (here's the best part) when you peel it
off the cured lamination, it leaves behind a roughened but uniform
surface that doesn't need any sanding before putting on another layer.
Stronger better faster, and no sanding dust. Secondary bonds put on a
peel ply-ed surface are about 20 to 30% stronger, and if you do it
while the resin is still a little green, it's not a secondary bond at
all.

I have laid on paint over a peel ply-ed surface and came out
beautiful. A resin finish would surely do the same, you could sand &
varnish the final coat if you chose.

Any pictures of your outrigger?

Fresh Breezes- Doug King

 
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