I've pretty much done everything I can possibly do to the left aileron without primer. I failed to order some more primer earlier, so I'm now in waiting mode. Once I get everything primed I can rivet on the stiffeners, bend the trailing edge of the skin, do the final fitting of the skins, then put it together. I went and marked and started cutting the stiffeners for the right aileron while I'm waiting. I toyed with the idea of going ahead and prepping the right aileron and prime it at the same time, but I like to keep my priming jobs small. It might seem odd, but I'd rather go through the prep and clean-up processes of priming more often and keep the jobs small than deal with large numbers of pieces.