OK. I have been sanding, scraping and primeing most of the car. it is covered in epoxy primer. there are a few spots that will need bodyfiller, what sandpapr should i use on the pimer (if any) before i apply the filler. thanks for any help.
scuff the primer with 180-220 just enough to scratch the primer and give the filler something to grab. maybe even 120. make sure to clean the primer with a solvent to clean all the dust off before applying the filler.