PT, I never seal a bow up, in my opinion and this is just my opinion I do not want my bows to completely dry out and if they are sealed they can dry out, it might take a while if the bow had a descent moisture content when sealed but it will eventually dry out , and can become brittle over time and break. I have friends that make bows as well and several seal their bows, they have also had some (not all) of their sealed bows break with no explanation at all. I think this is due to the bows moisture content getting to zero. This might start a debate but I think a bow should have a small amout of moisture retained in the wood at all times and by not sealing the bow this allows the bow to breath however the oiling will prevent to much moisture from entering the wood. And yes I think that is very important to long bow life.
Again jmo.
Indianguy