I need to "spruce up" some tombstones for a special presentation by my
museum.  They range in age from an 1832 granite block to an 1850 limestone,
to a 1970 polished granite block.  I don't want to damage them any further
with abrasive methods, but they are thick with moss, rotted vegetation is
embedded in the deeply carved inscriptions, and one of them is nearly
overgrown with grass.  Can I use a stiff 100% boar bristle brush, and some
sort of gentle cleaner to, at least, make the stones legible again?  I will
be making a (one-time rubbing) of each, and would like to minimize the
possibilty of any damage.
Thank you.
Jackie Chin
The Hermitage
Ho-Ho-Kus, New Jersey
201-445-8311

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