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Unread 07-30-2013, 05:09 AM   #3
Davestone
Florida Tile & Stone Man
 
Join Date: Apr 2004
Location: Naples Fl.
Posts: 22,690
You should first remove the sealer with something like Aldon Premium Stripper,and some rags.
Then remove the grout haze with a grout haze remover,straight vinegar,or sulfamic acid crystals,and a stiff brush and wetvac.

http://www.aldonchem.com/section-products.htm
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