Dc2 got hold of dc1's markers, made two delightful scribbles (one large, one medium in the kitchen/diner!!!!! Need it gone by 6pm tonight. It's not wipeable/washable paint (chosen and went on before we had dc). So far I've been using wipes, which has ever so slightly lighted the occasional "streak" of marker, but really not made much impact.
What do I need to know? How do I fix this??