Only caution I can throw out there after trying acid etching before going all in on a raised floor with Delta FL as a water barrier below the tongue and groove OSB (a woodgrain luxury vinyl over the top), is to be certain the cement is impeccably clean. We discovered the former owner had let the their pets do their business wherever on the floor and while it had been scrubbed and buffed and no visible stains were apparent, when we applied the acid coloring, blotches started appearing that we couldn't camouflage.
I can also confirm that a black ceiling in a low heard room basement does wonders for making the room seem bigger. The ceiling simply disappears, especially if you can keep your lighting direct where you need it and low everywhere else. If funds allow, a Lutron Grafik Eye multizone dimmer can go a long way in the cool factor department.