Routine Concrete Cleaning
For stains, spraying commercial chemicals such as degreasers or a mix of oxygen bleach or rust remover is doable. The cleaners are sprayed onto the floors and are left overnight or for at least a few hours. Finally, once the cleaners have done their things, a pressure washer is used.
PLEASE NOTE: Because some concrete cleaning chemicals contain a strong amount of chlorine, ammonia, hydrogen peroxide, etc., the residue needs to be rinsed exhaustively with a garden hose.