RE: cleaning concrete

[John Niolon <JNiolon@uss.com>]

I don't have a good answer to that, but I would probably be trying a
chemical attack, like phosphoric acid or CLR (which contains phosphoric and
oxalic acids as I recall).

I've always seen Muratic acid used to clean brick/cement ???? wonder if
that would cut it


john

If you can't be kind... at least have the decency to be vague !!