I've got some weird voids in the gelcoat layer of a new mold. Any idea what would cause this? I used two coats of tooling gelcoat, brushed on. The only thing that comes to mind is that I may have put it on too thick, or not waited long enough (or too long) between coats.
What would cause this? All I've come up with is some sort of gas bubbles. The plug was clean and dry.
I'd also appreciate any advice on how to repair this. I'd rather not throw away a 5' x 4' mold. I could sand, fill, sand and polish, but I'm not sure what to fill it with.
Also, before anyone says anything, yes, the surface is crap. The original part has some serious issues. Polishing the plug makes it *worse*. Clearcoat is self destructing, fiberglass print through, blah blah blah.