I used Kiwi Grip when I redid mine a few years ago and it has held up famously. Be sure to use tape to keep your paint brush lines straight. I did not and any sand for grip, just the texture of the molded non skid in the fiberglass. I have a 1996 Hunter 37.5. Don't remember if I bought a quart or a gallon. Whichever I bought I only used half of it and still have the remainder in a can.