On Oct 12, 8:34*pm, "Bill" wrote:
snip of stuff about rub bricks"
*Should I be concerned about how flat the cutting stone stays (I'm
mostly only taking off paint, grime, etc.--that is, I'm not cutting deep)?
I am probably doing things the hard way, no?

Yes. :-) I'd use a pressure washer to remove the paint & grime. Then
rub the concrete if you still need to.