A couple of question.. if I get the rustuelom do I get prof or regular paint? second.. can I use a dark or light primer? or do I really need one? third.. which grit sandpaper do I use beside 1500 and 2000? fourth... the powerpainter does it work well compare to the roller? if i use the powerpainter do I sand my truck as often as you do with the roller?.. sorry for all the questions thinking about painting my 78 tk..