Before using the Boat Descaling Wash, coarse soiling should be removed with an alkaline pre-cleaner and a high-pressure wash. This step should be skipped for ceramic-sealed surfaces. Dilute the shampoo 1:200 (50 ml to 10 l for hand washing) with water. This achieves a pH value of 3.0. If using a foam gun, adjust the pre-dilution accordingly. Wash the pre-cleaned boat with a washing sponge. Rinse off the product quickly and thoroughly to avoid stains. If possible, dry off any residual water to avoid new limescale stains. Do not use on teak decks and artificial teak deck alternatives.