Sharing this statement from Mr. Dennis Montagna, Vice President & Conservation Committee Chair, Association for Gravestone Studies.
Mr. Montagna's statement in this post is also included on a Page listed on the right-hand column of this blog.
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Two other statements on this subject, also on the Page, include those from Lynette Strangstad, author of the well-known publication "A Graveyard Preservation Primer" first published in 1988, and now in its second edition published in 2013; and Mr. Ken Follett, founding member and first president of
the Preservation Trades Network
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Statement from Dennis Montagna - Vice President & Conservation Committee Chair, Association for Gravestone Studies:
Shared with Permission:
"We
neither support nor condone the aggressive cleaning of cemetery
monuments, whether through mechanical or chemical means. Moreover, in my
nearly nearly thirty years in the preservation field, I can't think of a
single case in which the use of power-driven brushes made sense as a
stone cleaning tool. In fact, Nyalox brushes are typically impregnated
with aluminum oxide abrasives, so they would have an especially
devastating effect on calcareous stones like marble, limestone and some
sandstones."
Dennis Montagna, Ph.D
Vice President and Conservation Committee Chair
Association for Gravestone Studieshttps://gravestonestudies.org/
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Thanking Mr. Montagna for granting his permission to share his statement.
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Links to the Association for Gravestone Studies appear on the right-hand column of this blog including those for the Ohio Chapter's Facebook Page, and website.