I'm currently working on a 1971 Chevelle Malibu. It's not my daily so it's alright to tear down, but I don't have the cash flow for a full all out frame-off. I just want something I can drive and have fun with. I'm looking for a temporarily permanent paint choice. I want to paint the car flat black but I don't want it to rust and I also want the paint to last for at least a couple years with minor touch ups. What kind of paint should I be looking for? I've seen stuff called POR-15, but I don't know much about the different types. Any help is appreciated.