| I have a situation with some 'oil-canning' occurring on the bottom of the wing tips. I mounted the wing tips and as best I could |
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| determined where the oil-canning was occuring and the size of the area. I marked the extents with a pencil. I thought about |
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| several ways to fix the problem, but settled on adding an internal partial rib to each tip that spans the area affected. I have some |
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| 1/4" foam left over and measured and cut a piece just big enough to fit the area. Some slight sanding got the contour to match |
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| the wing tip. I then layed-up 2 plys of 6 oz cloth between a heavy duty trash bag segment, and then cut/trimmed the lay-up to |
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| the same dimensions as the foam plus 2 " (to allow for attachment to the wing tip. Applied expoxy to the form rib and the wing tip |
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| sides, then removed one side of the trash bag plastic, and put the lay-up in position on the rib, used a squeege to remove air |
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| bubbles, and stippled it with the brush. repeated for the other rib following same procedure. Remounted the wing tips and it |
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| seems to have solved the problem. I painted 4 coats of smooth prime on the hinge covers, then sanded them w/ 220 grit and |
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| remounted them. I also rounded the edges of the routed out area where the covers will sit so that when painted they will look |
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| better than a sharp edge. |
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