Do yourself a favor and buy, rent, or steel a floor scrubber (autoscrubber) with a black scrubbing pad. That is what I used to clean my shop floor and a couple of friends shop floors after the construction was done and all the tire marks and oil leaks were left on the floor. I’ll try and attach some before and after pics. Use a tiny amount of dawn dish soap and water in your floor machine with a black pad and when you get done your floor will be so clean your shoes will screech like a gym floor.