Methods, compositions and kits for masking and subsequent removal of oil, grease, rust and other stains from a variety of rough solid surfaces, including, but not limited to stone, concrete, asphalt, stucco brick, and ceramic. The methods include coating the stains with an opaque or translucent thin...http://www.google.se/patents/US20060276360?utm_source=gb-gplus-sharePatent US20060276360 - Method for masking and removing stains from rugged solid surfaces
