My son decided to use a Sharpie permanent marker to create a self portrait on his white walls in his bedroom. I tried so many different combinations of concoctions I found online to get the marks off the wall and nothing worked. My husband found this online and after reading such good reviews decided to give it a try. I was really put off by the texture of the foam sponge after damp. Although it did get all the permanent marker off of the walls the sponge started to disintegrate very quickly. Luckily, I didn't have to use another sponge! All in all, great product to keep on hand when busy hands get into things they shouldn't!