I have a 70 Barracuda that came from the east coast. For the most part the body does not have a lot of rust. I don't know why but they painted over the rust instead of prepping and then painting the car. Can the rust spots be repaired? Or would it be worth it to replace the fender. I know original is better, when possible. The passenger door has some rust at the bottom front edge. The frame has also been patched. Thanks