Pulling rivets
Staged rivets in every other hole and clear drilling where rivets are not fitting.
After clear drilling I removed the skin and cleaned out all of the shavings and re-assembled for the final time and started pulling rivets.
I did not use Bonderite on these skins because I didn't have a chemical bath large enough for them.
Closeup of the skin and rivets
I used 3M scotch bright pads (red) to scuff the skins to promote surface adhesion when these parts are painted.
It was probably overkill to mask the rivet lines using painters tape but I did it anyways to maintain the cladding on the rest of the skin until it is painted.