I don't recommend sandblasting body panels, the sandblasting heats
the steel and will warp the panels. There is an alternative called
media blasting which uses plastic particles instead of sand, less
damaging to the body panels.
I didn't have to worry about that when I did my CJ7's frame off resto
about two years ago, I ended replacing all of the sheet metal, floors,
etc. I did bead blast all of the hinges, torx bolts, little stuff like
that. I painted the fenders, tailgate, hood, windshield frame, grill
seperate(about 1-2 months earlier) from the body. Plus there were no tape
lines. Every thing was primed and painted before being put back together.
Everything turned out great.
I end up hanging all of the hinges, brackets. The bolts I stick into a
piece of cardboard so that can paint just the tops of them.
I highly recommend using a good epoxy primer with a quality brand topcoat.
I usually use PPG(Diztler)or Sherwin Williams. (Just my opinion on the
brands of paint I don't want anybody getting upset over that, these are
two brands that have worked well for me!) For non metallic colors that
I am doing a full paint, I almost always use a single stage paint, and
for metallic colors I use base/clear.
Wayne