Got this idea from watching the "sharpie trick". Wonder if it would work with mineral oil?
The question is would mineral oil work in this.
Admit I'm a gadget freak, especially a gadget I thought of.http://markingdevices.americanmarking.c ... nk-markers
Guess I could do the same thing with a new small blackboard eraser kept in a ziplock or something. Or one I cut up.