Materials and Finishes
Acid rain has the unsettling ability to erase and obliterate stone and metal, the most durable of materials. Old buildings, monuments and tombstones bear the smooth signs of acidic corrosion and deterioration. Acid deposition speeds up natural weathering caused by rain, sun, snow and wind.
Acid rain also mars automotive paint. The auto industry considers acid deposition one type of corrosive environmental fallout, along with tree sap, pollen and bird droppings. Acid markings leave irregular, etched shapes on horizontal surfaces. Repainting is the only way to fix a car finish disfigured by acid rain.