I tossed it in the garbage and used some 3M scotchbrite pads
I bought this to prep a UTV bed for a spray-in bed liner. It didn't do much more than polish the paint I was trying to scratch up. I tossed it in the garbage and used some 3M scotchbrite pads.
Pros
It works like a charm! Tough enough to get concrete and stone work clean without damaging!
Cons
It doesn't work at all. You would do much better with steel wool.