The mission of the Historic Resources Committee (HRC) is to identify, understand, and preserve architectural heritage, both nationally and internationally. HRC is engaged in promoting the role of the historic architect within the profession through the development of information and knowledge among members, allied professional organizations, and the public.
This is not a sustainable use of expensive lasers as they do cause abrasion to surfaces.
The National Park Service, the GSA and other bodies have long used D2 biocidal cleaner and deterrent on historic buildings and monuments. But no sound scientific reasoning has been given for not continuing to use this approach.
John A. Fidler DipArch, MAarch, MAconservation, AAGradDiplconservation
RIBA, IHBC, Intl Assoc AIA, FRICS, FSA, FIIC, FAPT
John Fidler Preservation Technology Inc
Marina Towers North
4640 Admiralty Way, Suite 500
Marina Del Rey
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