Rustoleum Paint Question

BigBody79

BigBody79

Well-Known Member
Joined
Mar 30, 2005
Location
Lumberton
I layed down some Rustoleum Clean Metal Primer on Fiberglass.

More of an experiment really. I have sanded the the fiberglass to with 150 paper on a DA Sander. I then washed it with dawn, then I wiped it down with paint thinner just to get everything off. I rolled it on fairly thin. Did not get 100% coverage probably close to 90%. I have also started to sand it with 220 on a sanding block. I get good dust with very little clumping on the paper excect when I sand off the runs. However, I can still take my fingernail and scrape it off pretty easy.

How can I really tell if this stuff had adhered to the fiberglass?
It has dried for 24 hrs and quite a bit of time in the direct sunlight.

Can says recoat time is 24 hours and I would have guess it would have completely set up by then. Of course is has been fairly humid the last 24 hours. It is not sticky or tacky at all.
 
fiberglass is tough to paint and hold up. if it is a piece that can flex then you can see if it bonded by twisting it. I am not a paint expert but with fiberglass I leave it rough and paint it. it seems the smoother I get fiberglass before painting the less the paint wants to stick. hope it helps out.
 
Rustoleum rusty metal primer will not mix with strong acids and oxidizing agents which are both found in fiberglass resin. I'm not sure if they're active in cured fiberglass but the paint may react to it.
 
Gel Coat should be used on fiberglass.
 
Jeff B said:
Gel Coat should be used on fiberglass.
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this is what I thought as well, you can't just paint it with regular paint.... hence why so many people run around w/ white fiberglass fenders
 
BigBody79 said:
I read that the Rusty Metal Primer would do that, I did go with the clean metal primer.
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Sorry I meant to fix that in my OP. Most petroleum based paint with acetone or mineral spirits in them will likely react to the acids and oxidizing agents in the resin. Atleast thats my understanding, I may be wrong. I'm sure there are some painters on here who know better than me.

I would atleast try an automotive paint ie. Duplicolor acrylic enamel. It's like 4 dollars a can, it sprays much much nicer than crapoleum and it cost about the same.
 
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