Thanks! It's a commercial building but I have no idea what's under the concrete. I will say of the two slabs I'm doing, the first is lowest quality concrete ever poured. Will post pics. The slab I work on is high quality. The first, I have a ton of major crack and "worn away" repairs to do before the epoxy paint. I talked with Quikrete CS and they recommended their vinyl patcher that has a 2 hour working time.
Researching, I am considering renting a shot blaster if it's not too expensive. Found a few used on FBMP but they are all over $4000. Also considered gettinga. few bags of sand from HD using my blast cabinet gun. In the end I'm sure I'll only do HCl as you say.
I think this is what you used:
Armorseal 1000 HS
It gets high marks written about on garage and other forums. I will also paint my jack wheels with it or Cerakote those to keep the floor in best possible shape.
For interior walls, this Behr looks good:
5 gal. #PR-W15 Ultra-Pure White Semi-Gloss Exterior Paint
Looking forward to getting back (visiting mom) and getting going on this later this week/end.