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Initial Care of Presidents' Faces is not Merely Serving for Beauty
 
The initial cleaning of the presidents' heads ever is not merely serving for beauty: lichens and moss which gained ground onto the granite sculpture can lead to bio corrosion. If then water is infiltrating during the winter frost can cause cracks in the rock which up to now were sealed with a special mortar. Kärcher cares for long-term preservation of this terrific artwork when sponsoring the cleaning project at Mount Rushmore.
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