OMGHI2U. I'm currently doing two enclosures similar. I havent posted pics or a thread yet, cause I'd rather wait untill I can show it done. meh. Yes, You can. Use the green florist foam as UCP pointed out. I've used expanding foam mostly, it's fairly cheap, lightweight, and easy to handle - cut, carve, shave, shape. *You can make the general shape (cardboard, garbage bags & tape) *You need pour the 2 part foam *Add the details to it (using a small hand saw & hand planer). *Cover it with a cheap 3mil plastic, heat it with the heatgun (to shrink it & make all the transitions smooth), and voila! You have a mold to work off of. Lay a few layers until it's stiff enough to hold its own shape, pop out the foam, and finish glassing from the inside. -Nick