-- Last Updated: Dec-24-12 9:37 PM EST --
Plexus may have info on a web site.
Tell us what sort of object, and the area and shape of the base where the adhesive is.
If I knew I couldn't heat it, one approach might be to groove through the glued-on object with a Dremel of with one of those vibrating blade cutters. In some cases, if the thing to be removed is in an accessible spot, a hand saw, such as a small dovetail saw, could be used to cut grooves.
They should be close-spaced, no more than 1/2" apart, and deep enough to come *very* close to the glue layer. It might even be desirable to cross-hatch the piece.
If the piece-to-be-removed is not shaped for grooving, you might have to saw most of it off, with a horizontal saw cut. Then cut the groove.
Then the piece can be pried up, bit by bit, using a chisel or bull nose plane at a low angle.
Now, if you don't want to lose the piece-to-be-removed, you are in deep trouble.