Not thrilled
I have a large slate shower - 12 x 12 natural stone.  Our water is very hard and even though we sealed the slate, it is discolored and dirty looking.  I had hoped this was the miracle cure for the slate but it is not.  If anyone can tell me how to clean slate and what product to buy, I am willing to try it.  I have spent about $ 700.00 trying to get this slate clean with no luck.
Rating: 1 stars