Help!!! Grout Stained Tile

[envizibl1]

I have an issue with a white Crossville polished porcelain tile that was grouted with black grout :cry: . The grout has gotten down in the pores and after trying sulfamic acid mixed with Aquamix's nano-scrub, it is still stained. it looks better but the business owner is not happy with it :bang: . I hoped somenoe here may have some other suggestions that haved worked for you in a similar case :idea: .

Thanks!!

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[JTG]

SureClean 600. Got mine at a concrete/masons supply house. Be carefull with the stuff. Don't let it get on any metal. Rinse real real well when done.
I had a quarry tile that we couldn't get the grout out of and this stuff did the trick.
Good Luck
JTG

[envizibl1]

Jerry,

Thank you for the info. Iwill give it a try.

Scott