I like Top Secret one-part epoxy. Much cheaper than Petite (search on the internet for it).I've had it on a trailered sailboat for 4 years now and have no complaints. Its extremelly durable. The boat has one scratch where I tried to shortcut across an oyster bed but the bunk boards definitely dont scratch it up.
I was painting a Y-fler today with some of it. As cold as the shop is right now, it takes a full day to dry, but its a supepr glossy finish once it sets up.