I use a Koblenz P-2600 Commercial
Floor and Carpet Shampoo/Polisher for my linoleum and tile floors at home. Very effective and takes the human scrubbing effort out of it, as it basically glides over the surface while spinning. It comes with a variety of round pads and brushes
. I find the 3M scrubby style pads most effective at really stubborn grime. I would advise you to use only fine pads on the deck
, out of concern for scratching.
One word of caution about using harsh chemical cleaners; they can etch gelcoat
surfaces -- especially if you let them sit a while or dry in the sun. If your topsides are painted be VERY careful about runoff etching the paint