I made a mistake of leaving the dry erase stall signs labeled from last years county fair. Now no matter how hard I scub they wont come clean. Wondering if anybody has any idea's.
what stan said! this will even work if you accidently use a permanent marker on a dry erase board instead of a dry erase marker....personal experience!
I find that a high charged particle accelerator will just about remove anything. Unfortunately it will also remove the surface material as well!
<alien>
SD