SUBSTANCES FOR INDUSTRIAL USE IN METAL FINISHING AND METAL TREATMENT, NAMELY CHEMICAL CLEANERS SUCH AS CORROSIVE ACIDS AND ALKALIES AND DETERGENT BLENDS IN SOLID OR LIQUID FORM, ETCHANTS, BRIGHT DIPS, DESCALERS AND RUST REMOVERS SUCH AS ACIDS IN LIQUID OR SOLID FORM, RUST INHIBITORS, CONVERSION COATINGS AND BURNISHING COMPOUNDS