I suffered from this while standing in line for my drivers license; not fun
..no sireee bob.......but we did  once have this other problem ....a church
we were working on  had finally fixed their roof and drains ; 3 months later
they wanted the water stains cleaned from their limestone altar in the
baptistry....I said no it would be a waste of money; the bishop said yes as
they were having a special event on Easter;
I said ok ...but it will come back he said do it anyway...it was beautiful;
the service was beautiful and it did come back..we cleaned it again in 6
months ....It was great ; stone takes depending on thickness 6-months to a
year ..Best Michael

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