Ducky Products D-1000L Water Spot Remover, 32 oz. To keep your boat shipshape, put your trust in DUCKY Cleaning up your hull, kneeboard or ski is no longer a painstaking, time-consuming process with this nonabrasive, no-rinse, environmentally friendly formula Easily powers away water spots, grease and carbon deposits that can cause irreparable damage to your boat 32 oz. Spray bottle, 12 per case; sold each; one-gallon refill Available separately