Started removing the wing skins and deburring both sides of each hole. Then I turned down mating edges slightly to put a small crease in the skin which will push the edge down tight when riveted to the spar and ribs. Dimpled top inboard skin, countersank wing walk doubler skin which goes underneath the top inboard skin. What took a long time was stripping off the protective vinyl covering which has been on those skins for years. Also it took a long time sanding ight scratches, and some sporatic light edge corrosion, Filed down sharp corners and also filed the forward edge of the top inboard skin down to a previously marked line to remove slight overhang where tank skin meets up. Will continue preparing other wing skins and then all the ribs. Then prime.
