paint/painting?

My trailer will soon have an epoxy (sides) and fiberglass/epoxy (top) skin on it. My wife is eager to paint a beautiful color scheme, but we don't know about what type of paint to use. I've checked out RustOleum Marine Topside, Interlux Brightside polyurethane, and Uniflex 255, all have very limited color availability. West Marine has Interlux Premium Yacht alkyd-based enamel in white, I don't know if it can be tinted. Are there more common paints available that would be suitable for what we have in mind? My wife is checking out commercial painters as well.