Thanks Wilie!
I used DuPont Corlar 26P (later renamed Axalta Corlar 2.8 HG-D) epoxy in the other building. Very good stuff too, durable in that it stands up to brake fluid, spinning grinders, solvents, etc. It just takes much longer to cure before driving on it, and it still leaves tire imprints (stains?) occasionally if you park in one spot for lengthy periods. I stamped up a bunch of aluminum plates to put under the tires, but it's still annoying.
The paint supplier suggested 3 people, a mixer, a squeegeer (sp?), and a roller. I told him the 3 people will probably be me, myself, & I. 😁