I recently watched several youtube videos of a process using a vacuum table and fiberglass resin. Foam sheet or wood was laid on the table, then a couple layers of fiberglass, lay the plastic sheet over the top, vacuum hose on one end, bucket of resin on the other.
Start the pump and the fiberglass resin is drawn across the panel and perfectly saturates and bonds the fiberglass cloth.
Here is a video of a guy infusing a small part on his workbench.
http://www.youtube.com/watch?v=KP6H3pMeVSs
do a search of vacuum infusion and resin infusion and you will see everything fom surfboards to boat hulls and rudders.
This looks like a great way to do sides, doors, even curved hatches that are lightweight and structural strong with insulating qualities.[url][/url]