Removes Rust, Heat Scale Tarnish & Oxides – 5 Gallons SC-80 is ideal for removing rust and oxides from water damaged metal tools and parts. SC-80 is also used for brightening aluminum and other metals and is an excellent choice for removing tarnish and heat scale from iron, steel, aluminum, brass, copper, plastic, & painted surfaces. SC-80 is non-hazardous,biodegradeable and has no harmful vapors. SC-80 is made from non- toxic organic acids, detergents & penetrants. Apply OB- 300 after cleaning with SC- 80 to prevent flash rusting.