I usually leave the bark on till its all dry. Takes one year to dry properly and up to two years to season well. So, if your going to take the bark off and the woods still wet, definitely seal it! Hope this helps Ryan. I've got a small stave I'm going to turn into a sinew backed NW style bow and will be taking all the sap wood off of it for that. You can make some really short sinew backed yew bows this way with some shorter draws and higher weights. Dont worry about cutting through the growth rings if your going to sinew it or back it. Doesn't seem to matter. Steve Allelie told me about this type of bow and he loves them. Some are as short as 32"-36" long! They draw shorter, around 20"-24" but still maintain a high poundages.