This product has a fast, rust function, not to hurt the metal substrate, does not produce hydrogen embrittlement. Features a wide range of rust, rust metal surface does not change color. Especially for copper, aluminum products, resume look like new after cleaning effect. Also be used with polishing agent used as a cleaning clothes. Able to remove the metal surface rust, welding spots, minor scale, dirt. Widely used in metal cleaning and metal rust after aging brightness recovery. Kay League copper aluminum light cleaning agent strong advantage :: 1, degreasing, rust, bright feature triple. 2, simple operation room, without complex equipment, can be used at room temperature. 3, for copper, aluminum restore bright as new results. 4, safety and environmental protection, no contain harmful substances, odorless, water-based products.