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Unread 04-20-2013, 11:36 AM   #2
Florida Tile & Stone Man
Join Date: Apr 2004
Location: Naples Fl.
Posts: 22,690
Yes,i believe it is the chlorine sealer chemical reaction.But,a simple cleaning with a neutral cleaner may actually get it off.Or a light acid wash.
I have had this happen and actually thought it was pollen as i didn't use a sealer yet.
If above doesn't work try a light acid wash and reseal.
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