start of body work

Use a good self etching primer from SEM to cover the small spots. The right way to do it is strip the entire car and epoxy prime it before doing anything bodywork wise. The epoxy prime will protect the metal from rust. Do your bodywork over the epoxy primer( scuff it real good first) then when all of your bodywork is done then you put it in filler primer. Then the fun of blocking and priming, blocking and priming 10 times until its perfect then you are ready for color. Yea just get yourself a cheap DA from harbor freight and a big roll of 80 grit DA paper from autobody tool mart and you will be on your way.