Sail,
I looked into Top Secret when I did my deck a few years back. The bio said that the company paints were used on naval vessels & shipping vessels & had recently started to sell to the public.
It's a two part epoxy paint that also has etching & thinner items as well. I ordered my stuff from their web site at a fair price. As with any two part paint, it has to be done right for a good job from prep to finish.
http://www.topsecretcoatings.com/
Here's how my painting turned out, they have a list of colors to chose from. So far, it's been bullet proof.
CR