On Dec 6, 1:43*pm, (Graven Water) wrote:
I need to remove some paint from a concrete block wall, before waterproofing
it.
I have a drill that uses bits with 1/4? hex shank.
So far I've tried a 4" brass wire wheel and a small brass wire cup. *The
wire cup doesn't work at all. The wire wheel gets off a lot of the paint,
but not all of it. *The problem is the roughness of the concrete block
surface. *The wire wheel does fine at removing the paint from the mortar
between blocks.
I can get the paint off fine by hand with a tiny wire brush I have, if I
really bear down. *But I have about 100 sq feet of wall to do, and that would
be way too much work.
I'm sure sandblasting would get the paint off, but I've never sandblasted
anything and I don't know anything about it. *I don't know if you can rent a
small sandblaster. There's a ceramic tile floor, a wood staircase and a
painted closet near that area that would have to be protected. *Sandblasting
would make a big mess.
Is there some kind of wire brush that would work better than the ones I've
tried?

thanks
Laura

If it's that hard to remove, why bother? Get the loose off and just
apply your new finish on top of it.