quick fiberglass ?

my firend wants me to fiberglass him a dash peace. now he has the one that came outta the car he just wants it to be fiber glass. If i use that as a mold how can i stop it form sticking to the stock peace. I was thinkin lay tin foil down then fiberglassin over that. He want like the stock peace made outta fiberglass.

Lay down masking tape with turtle wax on it. Works for me.

Brian