Agree with Dan. 

On Wed, Jan 10, 2018 at 6:54 PM Dan Brown <dan@vcleaning.com> wrote:

Looks like its darkened from oils.  I would make a poultice out of talc and degreaser, cover for a few days and pull to check.  



From: sccpartners@stoneandtilepros.simplelists.com <sccpartners@stoneandtilepros.simplelists.com> on behalf of mark winslow <mwinslow1960@gmail.com>
Sent: Wednesday, January 10, 2018 3:21:49 PM
To: Stoneandtilepros
Subject: IMG_2075.JPG
 
I have a customer wants stains removed and sealed said she tried baking powder I am still not sure what to use any suggestions would be great Thank you

 
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