[Moe]

I wouldn't take acetone to a fiberglass boat. Acetone damages the resin. Lacquer thinner would be a better option.

But..........Any good cleaner wax like 3M or Starbright should do the job. I've used Starbright non skid cleaner with good results, too.

 

[Moe]

Cured fiberglass resin (polyester) is not effected by acetone. Acetone is used for cleanup in the laying up process but once it's cured acetone wont do a thing.

You're probably right. I was just going by what the guys told me at the SeaSport factory told me when I bought my boat. They said I could use lacquer thinner to my heart's content, tho. I really don't see any need to use acetone, anyway.