is the original down pipe on an 87 stainless steel I tried to clean off all the outer rust but can’t get it to shine I don’t like that ceramic coat painting what’s the best paint for the down pipe ?
POR15 makes a hi temp paint that looks nice and holds up well. It's the best "cheap" option I have found. Sand blast the parts then immediately paint for best results. Otherwise you should go with chrome ceramic coating with high temperature characteristics.