How to Paint a freshwater boat

I have been reading alot of tread here and have not come across any thing that really fits my situation. My fiberglass money pit is ran in the ocean in southern California once a month but spends most of its time in the local lakes. I keep it on a trailer in the garage. Im not really concerned with paint properties and preventing build up. I simply want to paint this this for cosmetic purposes. What is my best option that will fit this kind of use? What kinds of paints should I be looking at?. A friend of mine are going to end up painting this our selfs. Can anyone point me in the right direction with this.