At 4:49 PM, Jill Brickey
At 9:22 PM, Randy & Sarah
I usually first try making a paste of baking soda and water for just about every kind of stain. Works on most. If it doesn't remove it, it at least lightens it. There's just enought abrasiveness to it, but no bleach or harmful chemical.
Hope you find something. We are way too familiar with markers and unacceptable "canvases" at our house. Picasso has been in the foyer, living room and dining room--all on the same day! Didn't ask to be paid.
Have you tried just a normal pencil eraser? That or just rubbing/scratching it off may work. Pat Summit signed my laptop with a permanent marker and it's already coming off just from me touching it.