...with this kind of attachment, I think it's called a cup-brush:
Basically the brick still has a lot of cement on it, which chips off easily. Applying the grinder to the wall produces violent cement-shrapnel shooting in your face, as well as sparks because the brick is stone. It's a horrible process and hurts the skin, but getting off the loose cement was important enough. We don't need any free non-dairy creamer for the customers coffees! Here's a couple of pics from the mess:
Me:
We're almost done. Tomorrow I'll put in a couple of hours and see if I can finish it off.
-Ryan
-Ryan