CHEMTROL Descaling compounds remove scale, rust, tarnish and discoloration from ferrous and non-ferrous metals. These products are also used as a bleach to restore natural metal color to parts which have been subjected to prior processing. CHEMTROL descaling compounds are designed to take advantage of the mechanical energies imparted by the mass finishing motion allowing the use of less corrosive acids than required in strictly chemical stripping operations. Cost reductions in waste disposal can be realized.