A bit of scuffing of the rivet lines with Scotch-Brite pads, and then I took the skin over to the DRDT2 machine to dimple all of the holes. As with the other wing skins, I couldn't get some of the holes near the center because of the machine's handle getting in the way, so I had to use the close-quarters dimpling tool for those places.

What's next? Clean all of these parts and then spray some primer paint on the ribs and the rivet lines of the skins.