Polyurethane Foam

Any helpful hints on using polyirethane expandable foam to create a mold around which one would fiberglass?

Driving a 2002 Elantra GT Fast Back and I wanted to FG a custom sub enclosure in the corners of the hatch to save space for stuff (specifically, my 11 month old sons stroller).  Has anyone done so in a similar situation? If so any hints or guidlines to doing so? I thought of getting the FG DVD for $50 bucks, but $50 is $50.

TKS

Cornfed

Your right, I guess I would have sand down the foam prior to laminating the foam with FG! Good point. I will also probably have to cut the FG to get the foam out unless I were to leave one end open.

Then what? Do I form the woofer mount off the existing FG shell?

TKS

Thanks,

Yeah, I got a hint from Tim Rightnour about the "heat" that will be set off by the foam and that I should do it in 2 or 3 smaller layers of foam to prevent the palstic from melting. He also said to use 2-3 layers of foil to keep it from heating up the metal too much. Who knows, I may just glass it w/o the foam.

Anyone in Phoenix want to help?

Corn