looks like iron oxidation..poutlice with iron out<br><br><div class="gmail_quote">On Mon, May 14, 2012 at 3:33 AM, Adam <span dir="ltr">&lt;<a target="_top" href="mailto:info@restoreyourtiles.com" target="_blank">info@restoreyourtiles.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
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Adam Bartos<br>
BiO Tile &amp; Grout Restoration<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><img src="http://www.stoneforensics.com/stone-detective.png" width="200" height="129"><div>Frederick M. Hueston PhD<br><a target="_top" href="http://www.stoneforensics.com" target="_blank">www.stoneforensics.com</a><br>
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