Hi,
We just finished the heavy lifting on a heavily coated slate and brick floor. Came out looking really great except that there are some areas of hard water deposits/efflourescence still remaining on the surface, particularly in the entryway.  Was wondering what product(s) people have had success with as far as removing this white stuff.  See pictures below.
Thanks much.
Baird
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From the desk of
Baird Standish
Managing Partner
Facility Specialists, LLC
1616 Walnut St.
Philadelphia, PA 19103
Phone: 215-732-7505
Fax: 215-546-9160