Well thinking about what I'm gonna skin the buggy with when I get to that point. I've seen custom fiberglass work on those ricer shows for their speaker boxes and all, doesn't look hard. Simple wire mesh backing formed to your shape, lay the fibgerglass mat, layer it up and let it harden. My only concern is, which do you think will be lighter, some good layered fiberglass or some pretty thin sheetmetal riveted on. With fibgerglass I could make fenders/hood one easily removed piece. Body flex shouldn't be much of an issue since its a tube chassis. I figure as long as fibgerglass isn't right in front of the tires mud and rock path(where it would be hit) it would hold up.