Hello Ms. Quinn,
If the individual artworks are not assembled with hot glue, you can use a heat gun or high-wattage hair dryer to soften the hot glue enough to get them loose. Tape a few layers of cardboard over the artworks to shield them from the heat.
If they are assembled with hot glue, your best option is immobilizing the large screen, then gently working very sharp chisels under the artworks, erring on the side of the screen. Use a mallet to get the best control of the cut. You may not be able to get all of the hot glue off the mounting surface of the artworks, but you at least should be able to free them from the screen, depending on how large they are and how much glue the artist used. Naturally, if they are bigger than the length of your longest chisel to the center, you may have to improvise a tool.
Good luck!
Cordially,
Paul Pallansch
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Paul N. Pallansch
Dot-Connector,
Up-Close Realism
Silver Spring MD
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