My routine for maintenance of ablative bottom paint (Micron CSC) is to have the boat pressure washed on haul-out for the winter, and every three years in the spring to wash it with Joy and a big sponge+Scotchpad combo, then apply two-three coats of paint, depending on the location (more on the rudder, stem, etc.). This spring the yard owner very much took me to task for washing the boat as above, claiming that only dry sanding with a dustless sander is permitted under Connecticut state law. I could not verify this on Connecticut's "Clean Marina" website. Dry sand ablative bottom paint? Can a guy with a bucket of Joy and sponge be a menace to the planet?