SCRAPER BLADE 4" x 4". The Stortz Wall Scraper is used to scrape mortar from walls or molds when they are in excess. It's cheap, versatile and of high quality. It features a single beveled blade specially made from hardened spring steel. It is a great tool for preparing surfaces prior to pressure washing. It is also used to scrape or clean floors of undesired caulking, gum or putty, and in removing wallpaper or paint from interior walls. It also helps to remove asbestos materials from ceilings or walls.