We recently installed a grey slate floor in our bathroom. We did not seal as your web site suggests and now notice that the grey slate seems to be turning a lighter grey. We have been told that it will come off if you use acid to clean.
How can we once and for all bring the colour back.
Will sealing the tile cause it to darken? Is there hope?
Thank you
Neil MacLean
PS Do I have to watch your web page for a response or will you e mail me back
Cheers.
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