Is the stain on the surface or is set deeper.
I would hit the stain with some sandpaper and see how deep or not.
The ammonia hydroxide works pretty good.
Acids can ell as well.

Sent from my iPhone

On Mar 9, 2015, at 1:47 PM, Stephen Webb <stephen@newlifemarblerestoration.com> wrote:

I have had success with Fred's suggestion

On 3/9/2015 7:24 AM, Fred Hueston (via sccpartners list) wrote:
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I would try mixing some ammonia with water. This will create Ammonium hydroxide

Frederick M. Hueston
www.stoneforensics.com
321 514 6845



-----Original Message-----
From: daci6537 <daci6537@comcast.net>
To: Stone and Tile PROS Technical Support <sccpartners@stoneandtilepros.com>
Sent: Mon, Mar 9, 2015 1:07 pm
Subject: cooper stair removal

Does anyone know how to get out cooper stains from stone?  We have been trying to find Ammonia Oxide. but can not find anyone who sells it. Does anyone know where we maybe able to get a product with it in it? Thanks
 
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