Goof off will work no problem. Use it all the time at work to remove blemishes from tubs, showers, and tile floors after some idiot sub-contractor has slid something across em. And of course take off those damn pesky stickers that leave shit everywhere. If you can't find goof off (which shouldn't be a problem) you can also pickup a gallon of Xylene. One of the active ingredients in goof off. From my experience it does the same thing and its cheaper.Try a product called Goof Off.