Excerpt from Keeping It Clean: Removing Exterior Dirt, Paint, Stains and Graffiti From Historic Masonry Buildings
The author wishes to thank Norman R. Weiss, whose two draft reports prepared for the National Park Service, Exterior Cleaning of Historic Masonry Buildings and Removal of Stains and Paint from Masonry, were invaluable in developing this publica tion. In addition, the author also wishes to acknowledge the contribution of the following individuals who provided technical comments on the manuscript.
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