Polycarbonate proving difficult? This https://www.theplasticshop.co.uk/plastic_technical_data_sheets/chemical_resistance_guide_polycarbonate_sheet.pdf has a useful looking table of possible solvents and non-solvents although all the possibles seem even less attractive than the problem.
Somehow the whole story reminds me of a reported episode from student days when a particularly obnoxious denizen of halls was pounced on by several others after a party and treated with contact adhesive (who had that handy, I wonder; was there really glue-sniffing going on in those far-off days?). Subsequently taken to the local hospital and greeted by the doctor with "Christ, is this some new perversion?".