You're not going to need different paint but you will need different primers.If you strip the steel I put down a coat of DP40(PPG) epoxy primer for corrosion protection.You should put down a thin coat of etch primer first but it only comes in quarts of primer and activator and will cost alot for the few ounces you'll use.There is a lower grade in spray cans but it really isn't meant for anything but small touchup.You'll be fine without it as long as you DP it right after stripping it.The DP will work on the plastis too but you should put a coat of plastic adhesion primer on first,it's usually clear and thin like water.Take a piece of the plastic with you to the paint store in case there are different primers for different plastics.I think PPGs is a one does them all but can't remember.Sand the plastic with something like 800-1000 though because plastics like to exagerate sanding scratches that paint wont.If you let the DP set overnite you can lightly sand it and paint right over it instead of having to buy a primer sealer too.If you don't strip it just get a sealer to go over the sanded paint on the steel pieces and the plastic primer.Let it dry the recommended time and start painting.You really dont have to seal the paint if it's sound and sanded with 600-800,but you're sealing the plastic stuff so you might as well so if you have a transparent color there wont be a problem.For untaping the flames,etc..,I do it as soon as I can.I try to clean my gun after the last coat and go back to untape it,but I wait until it's flashed off and not still wet like you just sprayed it (which I think is the ideal time but almost impossible to do).You have to be extremely careful though and go slow.If you touch the paint it's still wet enough to screw up and you have to pull the tape slow so the if you get any paint strings you can control them and they dont fall over on the paint and ruin the job.Alot of people wait until the color has flashed off or dried really well but I prefer this way because the paint is still wet enough that most of the time the edge will flow out a little and not be such a hard squared off edge.
