Phil, yes, living in the South spoils us. If we're not swimming and scrubbing, we hire a diver to periodically scrub. In our neck of the woods, the side of the J/30 with the most sun get's the coat of slime. Regardless of the type of anti fouling paint, we would go over board for the serious races. I suspect we pay a diver to scrub about once every 6 weeks during the racing season.