Have replaced tub on my '82 FJ40 with Aluminum tub. Ready to paint now. Spoke with local body shop - they aren't real familar with painting aluminum. I 've spoken to the NAPA paint expert. He said: 1. Sand entire body with 180/220 grit 2. Wipe down with prep solution 3. Prime with self etching primer 4. Finish paint like any other vehicle Does this sound correct? I'm thinking of doing the priming myself then turning it over to the body shop for the finish job. Thanks for your help!