Ixnay on the steel wool
Did the usual 400 grit to 3000 grit paper, don’t use an air driven orbital, electric variable at around 1000 RPM’s worked best. I found hand sanding what the sander misses with 2000 then 3000 after final 3000 with polisher helped and a Dremnel with 240 discs do the lug holes perfectly. Finished off with Mother’s aluminum polish.
After hand sanding
After polishing with Mothers
Still gotta tale and paint the recesses
To seal or not to seal, below fronts done 3 years ago and sealer is yellowing and coming off
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Whoever designed these tailgates must still be grinning