[mr bruce]

Most commercial roofing supply houses have 4'x8'-4'x10'(around $40 bucks here) sheets in various guages. This stuff is of the softer alloy so it is easily formed on a break. It won't split on the bends like the harder stuff.Don't know the specific alloy ,but for panneling engine compartments ,etc, it's just the ticket . Then again ,it all corrodes pretty quik, so now you have to coat it (paint? anodize?)