[bondo]

I want to warn you, if you are not already aware of this fact, you cannot, I repeat cannot, fiberglass over the type of foam you are using. The styrenes in the resin will attack the foam and basically melt all your hard work into a sticky mess.

You need to put a barrier between the foam and the fiberglass resin before you laminate. Industrial strenght aluminum foil, available at any restaurant supply company, works great. It can be spray glued to the foam. 3M spray adhesive works best.

Carefully cover all the foam with the aluminum foil and tape the intersecting edges with 3M blue painters masking tape. ( I am not a sales rep for 3M, their products just seem to work best, from experience.) Then you can safely fiberglass over the foam.

Best of luck on your project,

Bondo