Kipling nylon messenger bag

Kipling nylon messenger bag So much storage - multiple pockets and zippers Can be worn crossbody, on the shoulder or by handles Can be used for school or gym Dimensions: 15”L, 12”H, 4.5”D Great condition besides the black stains from some wax pencils that I used in school. Obviously not visible from the outside of the bag. Tried many things to get it out but was unsuccessful. It does not rub off on anything or anything like that.