Hi,

I laid about 200 square feet of stone in my foyer. I grouted the
stone yesterday and when I finished, the grout where I started was too
dry to wipe off with water and a sponge. Also, I tried vinegar,
didn't phase it. There is a substantial amount of grout on the tops
of the stone, not just a haze. My drill and a wire wheel brush work,
but it's very time consuming.

Is there a better way to remove this extra grout? There's nothing
special about the surface of the stone. It's rough. It can take a
little etching or scratching and I'm not worried about it.

Thanks,
Jo Jo