Do you know what the old sconce was made of? Whatever the sconce was coated with may have leached onto the stone that it covered. That answer may lead to the appropriate poultice or, maybe a sample cleaning. Good luck<br><br>
<div class="gmail_quote">On Fri, Aug 20, 2010 at 7:50 AM,  <span dir="ltr">&lt;<a target="_top" href="mailto:lorne@fabracleenstoneandtilecare.com">lorne@fabracleenstoneandtilecare.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Thanks john,  but i just want to make sure i explained it well in my email. The dark area is what was covered by the old fixtures for all that time. Now they changed the fixtures and that is what is now showing. They even thought that the dark area may have been the original color. But it doesnt seem logical that the rest of the stone would all lighten uniformly except what was covered by the sconce.<br>

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<div><div></div><div class="h5"><br>
-----Original Message-----<br>
From: &quot;John Freitag&quot; &lt;<a target="_top" href="mailto:jfreitag@thestoneandtileschool.com">jfreitag@thestoneandtileschool.com</a>&gt;<br>
Date: Fri, 20 Aug 2010 08:20:02<br>
To: Restoration and Maintenance&lt;<a target="_top" href="mailto:sccpartners@stoneandtilepros.com">sccpartners@stoneandtilepros.com</a>&gt;<br>
Reply-To:&quot;Restoration and Maintenance&quot; &lt;<a target="_top" href="mailto:sccpartners@stoneandtilepros.com">sccpartners@stoneandtilepros.com</a>&gt;<br>
Subject: RE: [sccpartners] wall in building entrance<br>
<br>
Lorne,<br>
<br>
The dark color looks like it might caused by the polishing of the metal, if<br>
the metal has been polished in the past. I see the darken of stone when<br>
janitorial companies polish the stainless that is next to the stone the oils<br>
from the metal polishes over time go into the stone.<br>
<br>
Try cleaning with an alkaline based cleaner, you will probably need to make<br>
a poultice and apply to the stone. the poultice can be made with an alkaline<br>
based cleaner or for oil stains I prefer mineral sprit mixed with the<br>
poultice powders.<br>
<br>
<br>
<br>
John E. Freitag<br>
President/Director<br>
The Stone and Tile School<br>
Office 407-567-7652<br>
Cell 407-615-0134<br>
<a target="_top" href="mailto:jfreitag@thestoneandtileschool.com">jfreitag@thestoneandtileschool.com</a><br>
<br>
<br>
<br>
<a target="_top" href="http://www.thestoneandtileschool.com" target="_blank">www.thestoneandtileschool.com</a><br>
<br>
<br>
<br>
-----Original Message-----<br>
From: Lorne Greenberg [mailto:<a target="_top" href="mailto:lorne@fabracleenstoneandtilecare.com">lorne@fabracleenstoneandtilecare.com</a>]<br>
Sent: Thursday, August 19, 2010 9:14 PM<br>
To: Restoration and Maintenance<br>
Subject: [sccpartners] wall in building entrance<br>
<br>
Hey guys, in the picture you can see the darker area around the sconce.  It<br>
is not a shadow, they recently changed the sconce and this is what was under<br>
it, it&#39;s not just dirt and I&#39;m not positive that honing and polishing would<br>
definitely make it lighter and match.  There are 3 of these on the wall.<br>
Has anyone seen anything like this before? The walls are highly polished,<br>
and the other pieces were up for a  few decades at least.  This is in<br>
Manhattan if that makes any difference, if this has to do with our clean<br>
air. Please let me know any ideas or suggestions.  Thanks.<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Sincerely:<br><br>Don Semi<br><a target="_top" href="http://www.srsdenver.com">www.srsdenver.com</a><br><a target="_top" href="mailto:srsdenver@gmail.com">srsdenver@gmail.com</a><br>303-249-7909<br>