Sue Walters Newsletter
She shows how to prepair bone for woodburning/boneburning. This is a very informative idea and one worth reading even if you do not want to attempt it. Be sure to scroll down through the ads to get to a Q&A section then the demonstration.
Also go to some informative newsletters in the back issue part of her web. http://www.suewalters.com/Newsletter.html
Very good source for wood and ? burning help tips.