Yes, sculptor01, that info helps, thanks!
So the tissue doesn't provide much strength, eh? Well, I'm wondering then, why this guy (whose build I'm reading about) bothered to use it over foam...and then even over styrofoam.... on the EXTERIOR of his build. I guess my only clue is that he ends by saying the tissue gave a subtle wrinkle effect that simulated rubber. But he kind of says that as if it's an added bonus. Oh well.
I saw a Youtube video recently where somebody takes EVA foam and coats it with PVA Adhesive and then that Smoothon stuff in order to harden the foam's surface into plastic. But instead of EVA foam, I have a lot of large pieces of high density foam lying around from a previous build. So, I thought I'd glue them all together (with 3M 74 foam adhesive), then carve my piece, then follow that same method. (Figured I'd just hollow-out the foam later, leaving a thin layer of it behind, similar to what it would have been if I'd have made it out of an EVA foam exercise matt.)
But then I read about this similar build where all he did was coat the foam with fiberglass tissue and epoxy resin... and started to wonder if that was a better idea... because it sure seems sometimes like the best build for a large piece would be to make the whole thing out of a thin layer of fiberglass anyways. I'm just not sure how to accomplish that, outside of making molds, which I'd rather lean away from. And, I've used the fiberglass cloth before with fiberglass resin... but only on the INSIDE of pieces. I've used just the resin to coat exterior pieces, but sanding it was always "fun".
Thanks!
-= Dave =-