I am in the early stages of building the wings. This past weekend I FINALLY finished fluting the ribs and have just started the final drilling of the upper and lower rib flanges. Although the plans were vague in this regard, when they said to flute all the ribs, I fluted ALL of the ribs to include the leading edge ribs. After final drilling, deburring, and dimpling, I will be priming them. I don't recall reading anything about this in the primer-war threads, so is it appropriate to prime the ribs that make up the fuel tanks? I am using the same Sherwin-Williams product that Van's uses, and my line of thinking is that perhaps exposure to fuel is not what Sherwin-Williams had in mind for their product. I'm wondering if there might end up being some sort of fuel contamination problem.