I've totally stripped down the body shell and have been chipping away at repairing rust spots. The big job was replacing the front half of both front chassis legs and the front cross member, and then I had to repair a lot of small fiddly bits. Of course I had no idea when I started, but now I think I am getting the hang of the welder!
Anyway, the underside had a lot of surface rust and little paint, and since there are a lot of nooks and crannies I decided to send it off to a professional sand blaster. The guy was recommended to me because he had a suitable rig - not too powerful! He joked that if you sent a car off to the serious industrial sand blasters there would be no car left.
I've attached a couple of pictures. I am very pleased with the results! It took the guy 1 hour to do the underside, wheel arches and sills. He charges $200 per hour of blasting time. So for $200, all the really bad bits are back to nice shiny metal. I think that's well worth it! It would have taken me months and not been nearly as good.
I gave him some two-part epoxy paint which is supposed to be very good, which he was going to spray on this afternoon. I can't wait to see the result![frame]