Good point. I just noticed the fruit loops in the living room...
I hid ALL sharpies!! But I have some interesting art work on my wall.And when they say permanent they aren't joking.
Is muddy duck gonna give you trouble? Sorry!
Try OOPS! or Goof off on your wall if it is a washable paint at all. put it on a rag and dab a tiny section to see if it helps.