How to Remove Sharpie from Developing Trays?

[Kilgallb]

+1 on acetone.

Humorous anecdote: I was in a meeting at work, in a brand new, fancy conference room, and I wrote some notes on the white board and then noticed that I was using a sharpie rather than a dry erase marker. I asked my admin if she had something that I could clean the board with - and she said not to worry, that she would take care of it.

She wrote a work order for facilities to erase the board.

Actually, she missed the best way. Carefully overwrite the permanent marker witha dry erase marker. Then erase with a cloth. The chemicals in the dry erase marker will clean the permanent marker right off.