Pettit's water-based Hydrocoat ablative bottom paint contains a formula of 40-percent cuprous oxide and durable resins that forms a slick, easily burnished film. By replacing most of the solvent with water, Hydrocoat is easy to apply and offers the benefits of low odor and easy cleanup and disposal. The environmentally friendly coating provides protection against algae, barnacles and zebra mussels, and does not produce an annual buildup of paint, so no sanding or scraping is required. Hydrocoat is available in blue, red, bronze, green and black. Retail price is $45 per quart. Pettit Marine Paint, Rockaway, NJ; (800) 221-4466; www.kop-coat.com.