http://www.forrestrace.com/diamond-grinder-3/

How do you strip paint off of concrete?
How can I get “waterproofing” paint off of concrete? Some of it is peeling off but most of it is really on there. I have tried paint remover and using a grinder with a wire brush but it didn’t do much. I have gotten some of it off with a hammer and chisel. I am thinking of trying either a pressure washer or maybe a “diamond wheel” on my grinder. Am I going in the right direction or is their something else that will get it off?
It’s probably and most likely an epoxy paint. The easiest most efficient way is with a sand blaster.
Hybrid Electrical Dressing of Diamond Grinding Wheel