3M Marine has recently introduced a new Heavy Duty Hull and Deck Cleaner. The special formula, which comes in a convenient hose-dispensing system, is designed to clean grease, oil, algae, fish slime, dirt and waterline stains from fiberglass, metal and painted surfaces. A 32 oz. bottle of concentrated cleaner sells for $30. 3M Marine, St. Paul, MN; (877) 366-2746; www.3M.com/marine.