I had a 6-8" shagbark hickory come down on Memorial Day weekend, I split it, sealed the ends, and let it sit a week. Then I peeled the bark off, it's very thick, and moist underneath. I do not seal the back. Be careful about reducing a stave too soon, I did that to one of mine and it "propellored" a bit, but also put in some natural reflex. Two months later and I just about have it floor tillered.