Quote:
Originally Posted by wetdec  Indeed they will so lets find out what we are dealing with before throwing acid on it.........dont you think
tiler
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Extreme does have a mild acid incorporated into it. However, I have used it on at least 5 different type slate installations to effectively remove water marks. If the problem of rust is also present due to the make up of the slate it is also one of the best cleaners that I know of for rust stains as well. It is also freely available as a product in the USA and this is where this guy is from.
Kev