PURPOSE: To improve polishing efficiency as for the barrel polishing of a stainless steel work by using as a compound a chemical polisher mixed at a predetermined ratio with hydrochloric acid, sulfuric acid and hydrogen peroxide.

CONSTITUTION: As for the barrel polisher of a rotary type or a centrifugal fluid type or a swing type or the like, the chemical polisher of a hydrochloric acid-sulfuric acid-hydrogen peroxide strain is used as a compound for the barrel polishing of a stainless steel work. In this case, the content of hydrochloric acid is 10W80g/l and the content of hydrogen peroxide is 1W10g/l, and moreover, the density of hydrochloric acid to hydrogen peroxide is in the range of 3W40 at a mol ratio which is considered effective. Also, the content of sulfuric acid is 10W60g/l and moreover, the density of hydrochloric acid to sulfuric acid is in the range of 2W30 at a mol ratio which is considered adequate. By the use of this compound, the surface of the work is efficiently polished by means of mechanical polishing and at the same time, can be polished with high precision by means of chemical polishing, and moreover, the polishing of a recessed portion and a holed portion, which are out of reach for mechanical polishing, is conducted, and the whole surface can be polished evenly.