This is one way that small-time DIY makers can produce very durable painted surfaces.
Some places that epoxy paint is already used:
Industrial-scale epoxy paints[?] exist, but that's not what this article addresses. This article addresses fairly simple rudimentary mixing pigments into any epoxy, and using that epoxy to coat a surface.
Artists sometimes use epoxy pigments, made to have a swirled pattern. And I'm not talking about that either, though this is closer to what I mean. I mean to use a well-mixed uniform color.