totalboat outdrive af aerosol for underwater metals (black, 12 oz.) totalboat totalboat outdrive af aerosol spray provides high-performance protection for underwater metals like props, shafts, struts, thru hulls, and trim tabs with a unique, copper-free formula that won't cause galvanic corrosion. its high zinc content creates a reliable barnacle barrier for a full season. this unique paint for running gear dries to a hard, smooth finish that self-cleans while the boat is in use.<p>apply to properly prepared metals, including bronze, brass, aluminum, stainless steel, cast iron, galvanized steel, and more. can also be applied over previous paint that is in good condition. for best results, before applying outdrive af aerosol, prep bare aluminum with totalboat aluminum boat etch wash, as directed, then prime with totalboat aluminum boat barrier coat. for all other underwater metals, prime with totalboat totalprotect epoxy barrier coat primer. spray multiple coats onto surfaces until the entire can is used. the effective life of the paint is proportional to the mil thickness of the paint applied. use only when the ambient air, surface, and can temperatures are between 40°f and 90°f. for best results, allow to dry overnight, before launch. do not paint any sacrificial zincs or anodes! totalboat outdrive af prop spray is ideal for use in fresh or salt water. for use above and below the waterline.<p>compare to interlux trilux 33 aerosol, pettit alumaspray, blue water marine drivesleek, aquagard alumi spray and pettit prop coat barnacle barrier. all totalboat products are developed for boaters, by boaters. we know what works, and what doesn't. 100 % made in the usa.