Thanks for the advice on how to repair the old riveted tanks. I guess I should have been more specific when I asked the question. The tanks I need to repair are on a 1967 Alon, serial # 238. When I had the wing fairing open to look for corrosion, I found the outboard end of the tank was welded on, not riveted. The fuel filler is also welded in, not riveted. Therefore, I assume the inboard end is also welded. The outside of the tank is smooth except for the three rows of rivets running around the tanks from top to bottom in approximately the same location as the ridges in the old riveted tanks. The rivets hold three stiffeners/baffles in place inside each tank. That is why I assumed that I would have to cut a hole in the end of the tank to gain access to be able to buck the rivets. I may try the "cherry Max" rivet with PRK, unless someone has a better idea. Thanks Lynn Nelsen
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