Just to be clear, and add nothing helpful to the thread, I think I hate you.

As a professional painter, let me make a couple of suggestions and thoughts. First, do you want a color? If you do, understand that where your tires go each time will wear the color there in a noticeable way, while the rest of the floor still looks great. For my own floors I have stayed away from colors, going instead with a clear Ben Moore clear concrete stain. It contains silicone, wears like iron, and you don't have any discrepancy of color. It is especially easy to use a clear stain on a new floor since you aren't hiding anything.

Ok, floor done. May scuff and put urethane down later, let's see how the epoxy wears. Orange and blue, yeah gator colors but like how it came out.

Nice Datsun. I miss my 280zx. Oh, the floor looks great, also

I do quite a few of these coatings on large shale application (50,000-250,000 square feet). Prep is most important. Acid washing works, however shot blasting works better. You can rent a shot blaster from a tool rental company. Then take a vacuum and hit every inch twice and get every inch of dust up. Application is easy as pie just follow the directions included. And be extremely careful on spikes. Epoxy is slippery and even more so on spikes.
If you have any questions my email is in my profile.