I use a deep cycled marine battery powered sprayer. It's called the Deckster. You can vary the pressure and spray pattern. As with all sprayers, you got to practice with it. If you would like more info on the deckster, you can access info through
www.sunbritedecks.com and look at the write up. Give Chris or Pete a call at Sunbrite and they can go over info with you also.
reedster