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Unread 09-16-2008, 10:52 AM   #21
Mike2
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Join Date: Nov 2003
Location: LaConner, Washington
Posts: 13,694
Restore is a good product. Alternatively, you could get some sulfamic or phosphoric acid from Ames Tile.

Here's a picture I was looking for earlier. This is what fresh grout looks when its been "burnt" by an acid cleaning product.

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