Pictoglyphs and spray paint

From: Tracy Hoffman <*hoffyt*> Date: Monday, December 8, 2003 · hoffyt

Does anyone have any ideas for removing spray paint from pictoglyphs
without damaging the underlying pigments?  These glyphs are probably
on a volcanic type stone like basalt.

Tracy Hoffman
Archaeologist

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                  Conservation DistList Instance 17:46
                Distributed: Tuesday, December 16, 2003
                       Message Id: cdl-17-46-021
                                  ***