In article ,
Rich Hampel wrote:

I need to do a large area of gelcoat repair.
Can anyone recommend any texts or manuals, etc. for viscosity mix, air
pressures, spray gun nozzle sizes, etc.

I have access to a color lab that will do the color matching
(spectrophotometer,etc.) but need some fairly good 'application' and
technique data.

I have been told the technique isn't much different than spraying
lacquer (which I did for a while). Please ignore my words if someone
that knows says differently ;-)

I'm sure the material instructions will tell you the numbers, but
nothing beats practice, practice, practice. I suspect you'll only need
a portion of the supplies, so it won't hurt to just try it out (properly
masked off, of course) and simply sand or strip the failures. I'd play
with something smooth first, myself.

Most people should start out with a smallish vertical oval nozzle,
"thinnish" mix, and only "dust" the surface from top to bottom or far to
near. Could take a lot of coats to fully color in, which would let you
adjust color, since I've never seen an exact match. YMMV according to
your spray experience, of course.

Wet-or-dry sandpaper is your *friend*.

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's Pages: http://members.dca.net/jerelull/X-Main.html
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/