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.
Let's face it, finding a 50+ year old car with a clean body is harder than winning the lottery. With a car that old there's bound to be a bit of body damage. If you're lucky, you might be able to find ...