I re-primed some of the areas where wet sanding (to remove sags) had gone through to the aluminum.

The solvent in this primer tends to soften the primer under the paint of adjacent areas, which causes the paint to wrinkle. I let this cure and sanded it smooth. The lesson: If you want to avoid these kinds of issues, I strongly recommend that you don't use Sherwin Williams industrial wash primer on your airplane. Instead, use some kind of epoxy primer that will be inert to the effects of solvents and top coats.

Baggage bulkhead repainted...

...and hung vertically to reduce the likelyhood of dust settling into the paint.