If you don't already have one of these, you must get one. I think Suzi was the first one who originally introduced me to the Mr. Clean Magic Eraser. I wish I knew what was in it....it is amazzzzzzzzzing. Since I haven't quite taken on the project of covering every white wall in my house with paint, there were quite a few ding/black marks on the walls and floors that needed to be taken care of. I went through 4 of these things getting most of them "erased."