I'm in Michigan, so we have some snow, salt, salt and a little more salt. My door and tail gate hinges are shot, they were when I bought the jeep. I picked up hinges (doors, body, tailgate, window, hood) pull offs from other jeeps. My question is, should I "powder coat", "under coat", "rhino line" or just spray them? I would prefer flat black but a gloss black wouldn't offend me. I have to do the body under the doors as well. I have to do something with the flares as well, I'd like it all to match, but I don't want to totally mess the body up for a new paint job..