There was quite a bit of really flakey bark on it when i started, after i peeled that stuff off, the stuff that is left seems to be on there pretty good. I think with a few coats of spar varnish it will stay. Ive seen birch logs out in the woods that are almost completely rotten that still have that one layer of bark on em. Im kinda thinking that without the bark, with as many knots as there are that it definately wouldnt survive.