I finished deburring the parts of the flaps. I also scuffed them up for priming. I’ve been doing this before dimpling as the dimples make it harder to scuff everything, and tear up the scotchbrite pads.
Then I wiped everything down with acetone and primed everything. Normally I dimple before I prime, but all the deburring must have turned my brain to mush, and I totally forgot to dimple before priming. Luckily, the Akzo primer is rediculously tough, and should be OK after dimpling. And I can always touch the primer up with some rattle can stuff if need be.