Abstract: A cleaning composition and method are provided for removing iron stains and scale from the external surfaces of duck decoys. An illustrative composition contains hydrochloric acid, stannous chloride, ammonium bifluoride, and water. The compositions are applied to the duck decoys with a pressurized sprayer to discolor and dislodge the stain and scale and thereafter the decoys are water rinsed with a garden hose or the like to remove the dislodged material.