After working on the baggage deck / rails. I switched gears and prepped / dimpled the bulkheads. I also countersunk the longeron / skin where the tailcone skin overlaps. I then hole-deburred the aft tailcone skin and dimpled using my c-frame dimpler. While I was at it, I riveted the F-609 bulkhead to the longeron.
I didn't prime the skin yet since I am out of primer. I'll pick up some more and take care of it next time the skins are off.