Thread: Gelcoat repair
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Old November 20th 09, 01:59 AM posted to rec.aviation.soaring
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Default Gelcoat repair

On Nov 19, 6:20*pm, Craig wrote:
On Nov 19, 1:46*pm, Bob Kuykendall wrote:





On Nov 19, 12:46*pm, Scott Alexander
wrote:


Anybody ever use PolyLux?


I've used a bunch of their 670 primer and their 300 gloss topcoat. The
primer was pretty good but nothing special. I really liked the 300
series, though; it sprayed on nice with a cheapie Harbor Freight
touchup gun and 1.4mm nozzle. Their gelcoat for molded parts was
pretty good, too.


The issue I had in dealing with PolyLux is that they're a small
company with little web presence. I haven't worked with them lately,
but when I last did there was no catalog of products on the web, and
when I needed information I had to actually phone them up. Also, I'd
sometimes call and find that what I wanted wasn't in stock and
wouldn't be batched for several weeks.


Thanks, Bob K.www.hpaircraft.com


I use a standard gun with Prestec also, but thin with a slow or medium
lacquer thinner. Dupont 3602S is my favorite. *The slow thinner lets
the finish to flatten out so there's a lot less orange peel. *Another
trick is to just fog on the first coat and allow it to tack so that
the following coats don't run off. *I run the paint on the thin side
and use multiple lighter coats that tack slightly between coats to
build up a flat finish, sometimes as many as 5 or 6 coats. *If I have
concerns about pot life while spraying I'll store the gun in the
fridge between coats. *If you're blending into an existing finish
extend the spray area a little each time so the thickness tapers out
onto the existing gelcoat. *At the end of spraying you can fog the
feathered edge with thinner only to get it to flatten out.

Craig- Hide quoted text -

- Show quoted text -


Std HVLP gun with 1.8 nozzle for Prestec. Note that excess thinning
can increase porisity in finished coats which ain't so good.
UH