over the last years i have painted my jimmy with tremclad ( exterior paint for metal) must of painted it a least 4 times, i used the jimmy for hunting and scrached the paint up figured it was cheaper 30$ a gallon. now the question if i want to repaint to a real automotive paint can i get by with a sealer or do i have too strip too metal? this tremclad is hard too sand its stays soft which means a lot off sanding and sand paper.