Dry ice blasting, only the paint and sealer flakes are left.
I like the idea of dipping, many 6 figure cars have been dipped.
I have been looking into it for a 67 dart convert I'm working on. It's not that expensive, and auto shipping from CO to Oregon, SoCal, or Midwest is about 1000 one way all in its about 4 to 5 grand.
I would also like to see cars submerged in the tank and rotated like a pig on a spit. I'm sure there are areas that don't get touched due to trapped air.
I may be over thinking it!
I would love to see someone setup an E coat company. Or better yet the OEMs could setup a line for auto restoration.