No two metallic floors turn out quite the same. That's the appeal, but it also means you can't pick colors from a little chip on a card. We make a sample board with you and choose the base color and the metallic color side by side, so you see how they work together before anything touches your slab. It's like test-fitting a part before you bolt it on.
The slab has to be smooth first, because any flaw shows through the swirl. Our crew grinds the surface, fills cracks and pits and takes off old coatings, so the epoxy has clean, open concrete to grab. Most of the floor failures I've seen started under the coating, so prep is the part I won't rush.
Metallic isn't the answer for every floor. A commercial kitchen that sees hot water and hard wash-downs is usually better off with urethane cement flooring, which is built for that kind of abuse. If you like the look of the concrete itself and don't want a coating, polished concrete flooring grinds the slab to a shine instead. I'll tell you straight which one fits.