My local sandblaster guy has a heavy hand, he is used to tractors etc. & will warp up thin sheetmetal. Dipping too far away. Also I am poor/cheap/frugal/got two kids. On mine I stripped the outside/inside wDA 80grit(lock the sander,w/the door on sawhorses, it can be done fairly quickly), pressure washed the interior, after drying, do any metal patching; then I used Rust Bullet(encapsulator) brushed into the pinchweld, followed by brushable seam sealer Mine were coated well inside w/sound proofing, what didn't come off was allowed to stay. Epoxy primer both sides. I did this to my '79 in 2000(driver,sits outside), so far so good. It had had a door skin replaced(brazed on in 1980)once, & started rusting all around the pinchweld where they all seem to start rusting. Brian
