Graffiti-free historic buildings
Thursday, September 10, 2009 - 14:28
in Paleontology & Archaeology
It takes seconds to spray on graffiti, but hours or weeks to remove - especially from porous natural stone or brickwork as found in the majority of historic monuments. The paint penetrates deep into the pores from which it is impossible to remove, even with a pressure hose or multi-component solvents. Often the only answer, other than living with the graffiti, is to etch away a part of the wall...