Ok really you need to cut this stone back with metal sintered diamonds then re-hone through the resin, but an alternative although you will need to get a rotary machine with a brush attachment and a wet vac is to use honing powder 60grit then 100, 220, 320, 400 rinse and vac inbetween stages then 500 grit with a white or natural hair (hogs) pad then seal with a premium impregnating sealer. I would also be tempted to use a High Alkaline cleaner at the 320/400 stage. It is unusual to start at such a low grit but am only advising it as the conditions and state of the floor. But you will get it looking like new once complete using that method.
Tony