"Tony Manella" ndd1 at prolog.net wrote in message
...
Hi Alun,
I don't recommend the pen while using a friction polish but with any other
finish I've tried; pure tung oil, tung oil finish, danish oil, shellac,
lacquer, polyurethane, walnut oil, mineral oil and bees wax, I've never
had
a problem.

I've had several brands of "permanent" markers, including Sharpie run when
exposed to alcohol. Imagine ketones would do the same. Don't count on it
staying sharp if you'll be adding finish, though writing on the finish seems
fine.