a friend of mine has recently decided to paint godzilla on his headliner (i donno why tho) and asked me to fiberglass it for him. since its not a structural piece, it doesnt need to be strong, just stiff

the easist way would be to start out by coating the stock headliner in resin, then laying down a layer of fiberglass cloth, or fleece

do i have to worry about the stock foam melting under the resin?

will one layer of cloth be enough? or should i do 2 ?

the vehical is a 2001 blazer, so its 4' x 7' .... good bit of space to cover, and thats alot of material to peel off if i cant glass over the stock material

You can put resin on the foam headliner. When the resin soaks into it it becomes very strong. You can soak your headliner with resin and not even use fiberglass cloth. Just finish and paint.
Bob

good deal, just wanted to make sure i wasnt gonna have 28 square feet of melted foam

if it's plain old insulation board ...the white stuff Styrofoam. polyester will eat it for lunch. It's vapors will even get after it if you have used eposy resin altho not as bad. I would use epoxy resin anyway as it doesn't stink so bad.

best to try it out first.