Whatever liquid/substance you use to try to remove the material from a
clear acrylic surface use one that does NOT have any ammonia in it. Ammonia
based products will eventually craze the acrylic, thus ruining it.

Albert Sperath

Albert Sperath, Director
University Art Galleries
Murray State University
PO Box 9
Murray KY 42071-0009

270.762.6734 voice
              3920 fax

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