Before I get rolling, I want to clear up one thing: Bondo is a brand name, though it's commonly used as a general description referring to any and/or all body fillers-kinda like Kleenex is to tissues.

Before Bondo came along in 1955, bodywork was a dangerous, delicate affair that required a torch, lead solder, and an ocean of experience. Polyester-based fillers arose out of a need. All the heat ...