Deburred the wing ribs. Beveled the inboard edge of the bottom outboard wing skin, where it overlaps the inboard skin. Masked, scuffed, cleaned, and primed the lines of rivet holes on the inside of the skin, and prepped and primed the wing rib flanges. Dimpled the skin, and dimpled or countersunk the ribs and flanges where appropriate. (Five or six holes in the aft row of holes have to be countersunk, since there's no way to dimple them and the underlying rib at the same time.) Installed nutplates around the access hole in the wing skin, and began fabricating the outboard W-822 access plate. (I accidentally drilled #8 holes where there should be #6s, so I'm reordering the cover plate.)