Remove the iron dust, bird droppings, tree sap and other minor irritants. Suitable for the surface pre-treatment before waxing or coating. Wrapped in a clay catcher sponge, so you can do your work without watering. Applicable Place: Automotive painted body. Instructions: 1. Put the clay bar into the sponge. 2. Pour water in a bucket, dip the clay and sponge to wet. 3. Rub the car body surface gently to catch the iron dust. Advice: Wet the clay and sponge again before the water in the sponge runs out.