Sanded the Eastwood roll-on epoxy primer with 320 grit on cordless orbital sander. Used two batteries to complete. Removed a few roller marks without going to metal. Wiped clean, then sanded leading edge and other curved or between rivet surfaces with a medium grit 3M foam sanding block. Cleared with compressed air and wiped down with Eastwood paint prep. Taped inside aileron pushrod slot from inspection port hole, used 4in plastic map plugs to cover inspection holes, #4 machine screws in nut-plates.
The inexpensive Eastwood gun air pressure regulator would not adjust pressure at the gun. Traveled down the hill to the Sherwin-Williams store and purchased a DeVilbiss gauge/valve reducer for $50.

PPE was disposable full suit, blue latex gloves taped around wrists, face mast with fresh VOC filters (couldn't wear glasses with full-face), Mixed 20 oz Eastwood white urethane 3:1 with medium speed (70-80degF) activator. Loaded paint into 24oz DeVilbiss DeKups disposal cup. Shot patterns against masking paper to adjust gun pattern and flow. Used 1.3mm nozzle and approximately 10-20psi at the gun. Made vertical and horizontal passes, trying to maintain a wet look, but it appeared to flash a bit quicker than anticipated.

Mixed 24oz 3:1 with the slow speed (80-90degF) activator and one part reducer. The second coat lay wetter for a longer period than the first coat. No touches or contact marks (!!). Clean up for 20 minutes then pulled masking tape from the inboard rib. Cleaning the cup was as simple as throwing it away.