You have to cut below the white area. Drano and liquid plumber does the same thing. A big consideration is make sure you feel compfortiable top polishing granite. You might want to practice on scrap piece!

--- On Wed, 2/18/09, Don Semi <don@srsdenver.com> wrote:
From: Don Semi <don@srsdenver.com>
Subject: [sccpartners] Granite - Sulfuric acid
To: "Restoration and Maintenance" <sccpartners@stoneandtilepros.com>
Date: Wednesday, February 18, 2009, 6:14 PM

Hello all:
 
Again, thanks in advance for any help provided. Responses are always a help. Latest issue, custy has "dark granite", I have not seen it yet. Cleaned kitchen drain with Sulfuric acid, wiped up the mess with a rag and then set rag on granite counter. Says it is eating the granite , whitish. I believe him but is there anything that can be done. Cannot see him until Saturday so was looking for some help. I know hydrofluoric acid will cause problems but then what to do about it. Can it be repaired through face polishing?
 
thanks

--
Sincerely:

Don Semi
Stone Restoration Services - Denver
Dedicated to the Preservation of Fine Surfaces
don@srsdenver.com
303-249-7909