I was turning some bottle stoppers for Christmas yesterday. I got one finished and went to take it off the mandrel, and it will not unscrew. I have tried every way of holding it I can think of and it will not break free. My fear is that the ca I used to finish it may have run over the end and glued it to the mandrel. I quit and went inside to think on the problem before I messed things up worse. The only things I can think of is running ca remover along the joint, or running a thin kerf blade between the mandrel and the stopper. Anything else I can try?