Polychem-® MF 610 Metal Finishing Compound is a mildly acidic finishing product for high-speed burnishing and tumbling of non-ferrous and ferrous metals, Polychem MF 610 contains lubricating additives and produces a lustrous finish to precious metals such as gold, silver, and platinum, as well as on steel, stainless steel, and aluminum and many other metals. Also use it to “refreshá¾ the stainless steel media used in tumblers for improved finishing and shorter run times. The concentrate is normally used at a dilution of 1-10% by volume. Comes in a one gallon bottle.