There was a technique that one of the mags had an article on many moons ago, about covering balsa or foam with fiberglass cloth and CA. They then scraped the surface with a razor blade to finish it?? I'm sure my recollection may be a bit off here, but I think that was basically it.

Easytiger, c'mon man you haven't heard of foam safe CA? Long as you've been around?? LOL! [&:]