Here is a picture of my handiwork to date. I started building this thing back on Columbus Day, and I got the inspiration from this very board.
Skeleton
Side view, right-hand side
Side view, front facing rear
Rear view
I used Owens-Corning FoamulaR 1 inch boards for the frame, and 1/4 inch FoamulaR sheeting for the skin. I got a gain of 1 MPG with it so far, and would have gotten more if I hadn't been so heavy with the gas foot.
I would like to coat it with something to protect it against the elements. Any ideas?