looks like iron oxidation..poutlice with iron out
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On Mon, May 14, 2012 at 3:33 AM, Adam <info@restoreyourtiles.com> wrote:
Adam Bartos
BiO Tile & Grout Restoration
773-575-5515 (c)
847-438-0212 (o)
www.RestoreYourTiles.com
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