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i wouldnt use a razor blade ... if you have to auto parts stores like checkers , shucks , pepboys napa ,, they have plastic razorblades ... there used to scrape gaskets off of aluiminum sealing surfaces without gouging the surface ... id use thoes over a metal razor
and for the paper .. is it have some kind of adhesive holding it on .. I wouldnt use acetone due to it causing damage/melting acrylic .. but I would use some mild petroleum product like WD-40 to disolve the paper and adhesive .... then some alcohol to clean it up afterwards