How do you remove scuff marks on wallpaper?
Don't overuse water on wallpaper!!! Or it will tear or bubble once it dries... Use a small amount of water and a magic eraser scrubber!!! I swear by them.
Try scrubbing it down with water and a sponge
Soap and water. Use a green scratch pad. That shouldn't ruin the wallpaper and it should remove the marks. It may all depend on the type of wallpaper.
Try matching the wall paper as best you can.