To protect the screws use galvanized screws and anti-seize or if you are worried about it coming undone use some lock-tight to help hold it. To prevent the pan from spinning as easy if it gets loose, add two more holes and insert the screws with a bolt on the back that way one screw is holding the pan on the other two are resting on the inside edge of the center cap hole.
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 I move at the speed of awesome.
"It's not rocket surgery!" -MetroMPG
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