Plastics and other composite materials are in widespread use for outer panels and on occasion, complete bodyshells.
Materials most likely to be used for bumpers are types of thermoplastic or polypropylene. Rigid materials like glass reinforced plastic and reinforced polyester are better for body panels.
The Renault Espace uses plastic body panels mounted on a zinc-protected steel chassis frame.
Mention plastic cars, and most people think of the leaky, creaky and crazed bodywork so common on...