Krinklglas® panels are resistant to most acids, mild alkalize and petroleum-based solvents. For basic cleaning, first try mild soap and water. Graffiti, paint and other problem materials can usually be removed with ordinary non-abrasive cleansers or solvents.
Most surface mars or scratches can be removed or hidden with a clear liquid floor wax. More stubborn scratches can be covered with clear polyurethane, which is also a good substance to restore surface luster after many years of exposure to the elements.