has anyone used shellac to seal polysterine prior to covering in fiberglass
Hi ya .. Well I have never done it. I am curious as to your cause? Now I've used shellac to seal plaster and wood for latex.. I would try a small sample and see how it goes. I don't believe shellac contains any acetone .. which will dissolve polystyrene ... high temp wax or a high carbona wax is used with fglass all the time .. even petro jelly ..
high gunZ Mcraw is right shellac might melt your polystyrene but the fibrglass definatly will resin will destroy it but i read in a book that lashings of emulshion paint on the polystyrene first was suposed to have elimenated this problem but i dont know if its true or false small experiment
cover in tin foil thats the secret