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I think THIS is what I'm most likely going to do. Question though: with either 3M wheels or wire wheels I assume I'd have to sand afterward to get a "tooth" on the metal, wipe down with a pre paint metal prep, then epoxy prime. What grit? 80?
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You'll need to sand. I used 100 grit. I'm no body man though so I'm officially advising you to check with a trained professional.
FWIW this was not a fast process on my truck. The original baked enamel finish had received many years of additional cooking in the sun in Nebraska and was tough as nails. Sanding did little to remove it as the sandpaper quickly filled and became worthless. Chemical strippers did a great job of removing the second coat of paint, probably applied some time in the '70s, but had little effect on the original finish. Even the acid tank was ineffective on some parts. Wire wheels are not high speed devices so the bristle wheel was about the only thing left. I can't tell you how many of those little green wheels I used up, or how many hours I have into stripping the panels. I will say it was far from the fastest or easiest experience I've ever had. I guess the big plus for me was that I could strip a panel or a section of a panel in between other work with minimum prep and cleanup time. For someone that gets bored with a task it's important to reduce big jobs down to smaller, easy to accomplish sections.