I had my garage floor pressure washed at the place that I rent. I didnt really think that there was actual concrete under what he washed off but hands down to Stidham Power wash
I know a guy who bought an old diesel shop and had it pressure washed,after it was clean the floor was so rough/pitted that you couldnt roll a creeper over it.It was good and smooth when they started.
That is the same way this one was it was kind of smooth with dust/dirt I was just tired of the nastiness. He had some machine he used that looked like a floor buffer