Today I started riveting the top skins on the rear fuselage. It took me about 3 hours to do the first every-other-rivet while carefully keeping an eye on preventing skin buckling. Another two hours was spent filling in the other rivets and thats when I noticed I had a couple of ripples, wrinkles or whoop-dee-doos. Dishartening at first but determined I drilled out rivets surrounding the imperfections for about10" in all directions, re-riveted starting at the trouble spot and worked my way outward from there. Working like a charm, and the fuselage looks very nice!