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Old Oct 23, 2012, 03:34 PM
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United States, MN, Brainerd
Joined Oct 2004
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the channels are plywood. they are constantly soaked and exposed to chafing/chipping/abrasion. mine delaminated a bit - i had to refurbish them.
best to treat them with an epoxy soak to waterproof them before painting and mounting.

epoxy soak: thoroughly mix 15 min epoxy, then slowly stir in a small amount of denatured alcohol (not isopropyl alcohol) until you have thin, milky fluid. make sure all the epoxy is dissolved into the alcohol. soak the wood parts (after all holes drilled, etc) in the solution, letting the wood absorb the liquid. remove and let the pieces dry. very lightly sand to smooth the surface before final finishing. you can also paint on additional coats of thinned epoxy.
i did this to many of the wood parts, especially the plywood ones.
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