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Depending ont he angle of the boat and the depth in the water, it's possible one side of the hull can rub against the wheel fenders on my trailer - I know I need to raise the bunks/rollers, but until I can do that (they are already at the maximum extent of their brackets) I'm wondering if anyone has a good idea for a protective material to put on the trailers to let the boat slip over them when necessary - maybe something like what Keel Guards are made from, but cheaper?