If you don't undercoat, then what do you do with it to stop it rusting??Still in body work purgatory. Opening every cavity to clean it out and remove rust before I start re-assembly. Found some PO had dropped a screwdriver down the post hole for the hard top. I played the most excellent… Wild Stallions! game of operation and retrieved it. No way in hell I’m letting some Philips Head screwdriver violate my restoration. I may have left it if I knew it was a JIS.
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And a couple of rust photos for fun.
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Two public service announcements: 1) do not put any undercoating or bedliner type product under your 40. It just traps water and causes more rust (my opinion, take it or leave it) and it makes repairs more difficult,. 2) this is a my bad situation. I sandblasted the tub. Don’t do that. It gets into all the seams and cavities and isn’t worth it. If I had to do over again I would have the tub chemical dipped. Oh well, next time.