After applying the epoxy primer, the problem that I had previously described became clear in one place... sanding the rims instead of sandblasting or dipping them. In the area of the recess of the air valve, the layers of paint were difficult to sand down by hand. So I sandblasted this small part in my sandblasting cabin. It was now clearly visible how deep the rust scars were in the visible external surface. Filling this with spray filler and then sanding everything down again to achieve a smooth surface and prevent the paint layer from building up too thick would have required countless additional hours.
Karl
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