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Unread 09-16-2008, 11:08 AM   #22
ceramictec
Tampa Florida Tile Contractor
 
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Join Date: Oct 2007
Location: Tampa, Florida
Posts: 26,500
yes, definitely heed Mike's warnings. try a inconspicuous area first.

don't let a real acid cleaner sit on the grout too long.(ie: muriatic, sulfuric or phosphoric)

I was at my tile warehouse with the StoneTech Rep and I was trying to etch polished porcelain, travertine and even burn grout with the Restore, but after a short period the Restore neutralizes and stops working unlike a true acid that keeps burning until neutralized with baking soda.
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