I am skeptical that there is any finish that will really hold up to 16 hours a day of contact with skin and the sweat that we constantly emit. I think you really need to find a very low allergen wood and go with that.
Thanks for the replies. I think I will give the BLO and wax a try BUT what kind of wax do you use?
As far as making rings from bone or antler I have not tried but maybe someone here can answer that question.