On Wed, 18 May 2005 16:03:33 GMT, Matt
wrote:

My water softener has leaked hard water very slowly for some years.

That made the floor damp and caused a buildup of lime on the concrete
floor. The lime is probably not more than quarter millimeter thick but
is unsightly.

My impulse is to use Lime Away, but I expect that that would attack the
cement in the floor.

Is there any good way to get rid of these lime stains?

ANything that attacks the lime stains is going to attack the floor
too... Do it it small increments, or use sandpaper on it and
then paint.