Antifoul stains on gelcoat

skipjack27

Petty Officer 3rd Class
Joined
Oct 6, 2009
Messages
79
I posted a query on this last year, but didn't get replies from anyone who definitely knew what to do - although there were some interesting and useful suggestions. I've still to get a satisfactory answer, though, and the same problem has arisen this year on slipping my boat.

I have some antifoul (International Micron Extra - black) stains on the gelcoat of my fiberglass cruiser. Some from an adjacent painting exercise last year, and some from my own carelessness this year. Although I immediately wiped off the antifoul with turpentine, some apparently ineradicable stains were left on (in, I guess) the gelcoat.

Any suggestions on how to get rid of these stains? Last year, I was advised to use a strong rubbing compound or even lightly sand. But how much of the gelcoat would need to be removed using this method? Does anyone know how deep gelcoat stains actually go?

Jeff
 
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