Ok im ready to have my car blasted and i want to get ready to put primer on before it starts to rust , how fast does this need to be done , is there a special prep like after blast or something i should use, and what grit should i sand it before i lay my epoxy primer on. Im doing the whole car chassis, underbody, body pannels everything should i use the same epoxy primer on everything . In other words HOW TO primer my blasted car