Priming aileron skins and stiffeners

I spent a good five hours in the garage scuffing, soaping, rinsing, acetoning, and priming the aileron skins and their stiffeners, which is actually less time than I spent doing the same for the elevator skins and stiffeners. Perhaps I'm getting faster now that I have the process down?

I always wear these novelty shirts when I'm working in the shop since I'd probably never wear them otherwise.