52 PAINT STRIPPERS; ACIDS FOR PICKLING, DESCALING, RUST REMOVAL, MILL SCALE REMOVAL; METAL CLEANERS-NAMELY, ALKALINE CHEMICALS FOR HOT AND COLD TANKS; CHEMICALS DETERGENTS FOR CLEANING, BRIGHTENING, STRIPPING OR COATING WALLS, FLOORS, MACHINERY, ENGINES, MOTORS AND VEHICLES, BOTH MOBILE AND STATIONARY; CHEMICALS TO CLEAN, BRIGHTEN, STRIP, OR COAT MACHINE TOOLS, CHEMICALS IN BOTH LIQUID AND POWDER FORM USED TO REMOVE SOILS OF ALL TYPES FROM FERROUS AND NONFERROUS METALS AND MACHINERY PRODUCED THEREFROM