Was called to estimate cleaning of the limestone (1500 sq ft) where  other contractor cleaned grout leaving 1" to 2" wide clean lines on all sides but the middle of the tile dirty. It wouldn't be a problem to clean the rest but he sealed all with impregantor pro sealer. I tested few cleaners but they didn't do anything. The dirt is still visible. I know that honing will clean all but the problem is with blending with the limestone in other unaffected areas. Stone is in very good shape and technically doesn't need any restoration work. Any suggestions of how to fix that problem?

Adam Bartos
BiO Tile & Grout Restoration
773-575-5515 (c)
847-438-0212 (o)
www.RestoreYourTiles.com