I read this thread with interest because I'm anticipating this problem myself. What I would be worried about with using expoxy for repairs is what to do if you ever have to remove the screws to make another repair?
I'm wondering if the factory just applied some type of thread lock compound to the screws if they wouldn't stay in better. The anchor idea provides a way to loosen the screw. What happens if you pull it all the way out though? Does the anchor kind of stay in place in the styrofoam middle?
I plan on painting all the outside screw heads this spring with clear nail polish. This really kept the rust at bay on my old Class C. not sure it did much to hold the screw in- although I suppose it couldn't hurt.
Phil
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