These door skins are direct replacements for the steel replacement panels without the need to bend the edges of the skin around the inner door stamping. Using Norton body panel adhesive, you simply apply it to the mating surfaces, sand the edges smooth, prime, block, and paint. The fiberglass panel will withstand hits and come away undamaged that would normally crease a steel skin. Any Repairs require $20 worth of fiberglass resin and cloth from your local auto parts store or WalMart.