[cRiPpLe_rOoStEr]

Originally Posted by Bicycle Bob

For super-light fenders and other panels, you can pull a fiberglass mold from the metal part, and then build up a thin fiberglass skin, with a layer of foam and then another thin skin, and a few extra layers where needed for the bolts, etc.

It's often reported that some Brazilian DKW racing cars had their body replaced with fiberglass ones which were so thin to the point of being translucent.