another gelcoat story

> Next step...................get some Prestec 2481 and brush it on and
> start sanding again. Gotta do this before the WX turns here in
> Washington and we start the rainy season.
>
> Brad


Bad luck with the gelcoat Brad, I would sand everything down with 80
grit, Prime with PCL Polyprimer (907 white), then sand with 220 and
spray on acrylic urethane (PPG concept super white), 4 flow coats then
block sand after 18 to 24 hrs with 600w, then 800w use dye-coat, then
let it cure for 3 days before buffing it out with liquid buffing
compound and a wool pad turning at about 1700 rpm. Gel coat was never
intended for airplanes, urethane was/is!
JJ
PS, do it before you need propane heat!

"Brad" <apispilot@> wrote in message
news:c6c6b68a-921c-4057-9fed-9a9cfe75213e@i20g2000prf..com...
>thanks for the comments and suggestions guys. as to the amount of gas
>we burned that night, Bob K might know, it was in his shop where we
>layed up the skins.............
>
>I am leaning now towards JJ's suggestion and not go with the Prestec.
>I have pretty crude painting facilities at my shop (read none) so I
>hope the PPG products can tolerate a less than ideal spraying
>environment.

FWIW

I sprayed a 26' boat a few years ago with AwlGrip under rather primitive
conditions - came out great.

I had a "tent" with a tarp for the floor, another tarp for the roof and
sheet plastic walls out in the middle of a gravel boat yard. I did it in
the spring when the days were warm enough, but I ran a propane heater
overnight to keep the temperature up to allow the paint to cure (lots of
moisture).

It turned out to be real easy to spray (I last painted cars back in the
'70s) - went on nice, flowed out nice. I ended up with one sag in the
finish coat (my face shield was so fogged up with overspray at the end I
really couldn't see good enough). No problems with adhesion and the boat
has been outside in the weather ever since.

Do yourself a favor and use outside air. Per the data sheets the
iso-cyanawhatever has "poor warning properties" - by the time you realize
it is coming through your mask, it is too late...

--
Geoff
The Sea Hawk at Wow Way d0t Com
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