Plan on at least 8 hours rubbing and polishing on a 20 foot pontoon boat. Wear rubber gloves. I apply one coat, buff it off, then use a little 0000 steel wool on stubborn spots, then apply a second coat. Get ready for a good upper torso workout, but you'll be amazed with the results. My pontoon boat is 25 years old and it looks better than the day I brought it home from the dealer. People are just amazed. Machine polishing works, but you'll spend most of your time changing pads. Hand application works best for me.