Nice pens Mark,
I have a piece of Jawbone I haven't cast yet. How is that material to turn?
Mike B
Not bad Mike, take your time and stop a couple times to give it a CA bath
and you should have no problem, I am careful not to heat it up,drill slow with a water bottle to keep the drill and hole cool,high speed small cuts and patience
because of the material density difference I usually finish off with some 180 wet or dry and a block to make sure everything is level before starting the finish process.
Mark