Undercoating

you can buy paintable undercoating,,,its a bit more money but not too bad. As for repainting over a undercoated area thats been cleaned, wow,,that stuff is so hard to get off. Areas that are wide open , maybe, but inside corners and those half a million seems under there??Mine was undercoated from factory (or dealer) so I figered it will hide my $*itty welding lol