If you're daysailing it and putting it back on the trailer each day, as others mentioned, don't waste the time and money painting it. I see you're from Ithaca. If you are looking for a decent ablative for a boat on a trailer, we had good luck with Blue Water Copper Shield 45 from the Bottom Paint Store. It's a little harder ablative than Interlux ACT, so worked better with the trailer bunks, and worked just as well for us on Cayuga Lake. We also used the boat for short periods in Maine and Rhode Island, and did a 3 week trip last year on Charlotte Harbor area of Fl. The boat was due for another coat at the time but no buildup there either. We no longer keep that boat in the water for long periods of time, so I'm not planning on repainting unless I have issues with the short trips we're taking with it, or it starts flaking off and gets ugly.