From what I've seen, if a coating is desired, the key things would be "fully cured" and "grease-free". Our former service manager decided to get the shop floor coated, using a generic light gray color. Looked good, BUT it was very slippery when damp or with any oil on it. At that time, the building was over 15 years old with a "used" floor. A few years later, some areas had to be re-touched, after another pressure-wash cleaning. Stayed stuck, then.
Before that, when they built the then-new body shop, there was a covered ramp on one end. He had it "clear-coated". Was very slippery with any moisture on it. Several employees slipped on it. Wrecker drivers couldn't back up on it, either, without much tire slippage . . . most gave up.
About two years ago, somebody the dealer knew sold him on a new coating for that ramp. So they pressure washed it and installed it, with some grit in it. Turned out better than we ever suspected! Even without the grit, it's completely non-slip, period.
One of our car club members had a shop with the same color coating. It was NOT slippery when wet or oily. Looked the same. Obviously some differences in brands or textures!
In my new (2 years now) 50x40 building, the concrete is "as installed". Was nicely smooth finished. Tire tracks and "spots" where the cars are parked for a while, exist. I'll eventually p;ut something on it, but from prior experiences, I'll do some intense shopping around to see what has worked best. Knowing that two similar-looking coatings can act completely different with a bit of moisture or oil on it. In getting things ready for the slab, we put a thick plastic sheet on the ground before the concrete was poured, as a vapor barrier.
Seems like that light gray color usually works well. Light reflectivity, easy to see "things" or critters on it, tolerant of a bit of dirt (compared to white), etc. Petty Blue, Desert Turquoise, or Hemi Orange might be "too much color"?
Enjoy!
CBODY67
