Deruster 11 J is a powdered, cyanide–free, highly alkaline water–soluble product used to remove rust, heat scale, weld scale, smuts, certain fabrication oils, and to strip paint from ferrous metals. Deruster 11 J has been formulated to perform such operations on irons, steel,and Stainless Steel alloys. Deruster 11 J may be used in an immersion operation with reverse or periodic reverse (P.R.) current to hasten rust and scale removal in a rack or barreloperation. Deruster 11 J should not be used on aluminum, brass, zinc die casting or lead alloys.