Acknowledgements
This Preservation Brief was written by Anne E. Grimmer, Architectural
Historian, Technical Preservation Services Division. Valuable
suggestions and comments were made by Hugh C. Miller, AIA, Washington,
D.C.; Martin E. Weaver, Ottawa, Ontario, Canada; Terry Bryant,
Downers Grove, Illinois; Daniel C. Cammer, McLean, Virginia; and
the professional staff of Technical Preservation Services Division.
Deborah Cooney edited the final manuscript.
The illustrations for this brief not specifically credited are
from the files of the Technical Preservation Services Division.
Washington, D.C. June, 1979
This publication has been prepared pursuant to the National
Historic Preservation Act of 1966, as amended, which directs the Secretary
of the Interior to develop and make available information concerning historic
properties. Technical Preservation Services (TPS), Heritage Preservation
Services Division, National Park Service prepares standards, guidelines,
and other educational materials on responsible historic preservation treatments
for a broad public.
"Dangers of Abrasive Cleaning" an Historic Preservation Brief
