It really is dependent on the wood. Some species are naturally waterproof and require no more treatment. It's one reason teak is so highly prized in marine applications and Ipe for decking.loganimlach wrote:so wait... some of you guys are skiing on unfinished wood sidewalls without any issues? i did all bamboo sidewalls for my first run and was thinking that I absolutely NEEDED to seal them, ending in me applying epoxy to each set with a paintbrush, which to be honest ended up looking like shit. I'm sure I could have done a better job, but it would be great if sealing them wasn't a necessity. I just feel like bamboo would suck moisture right in.
Given the applications that teak has been used for historically, I would guess its plenty durable for sidewalls. I have a pile of it in the shop so maybe I'll give it a shot this year.