I`ve used thinners or acetone: wrap rags/ kitchen roll around item, soak in thinners, cover in foil to stop evaporation, leave to `brew`. It will soften wrinkle and peel off more easily. Depends where you`re working though, on a down facing surgface that would be difficult! Nitromors will probably do the job and it`s a gel so it`ll cling to a surface. Whatever you use be careful, as however effective it is on what you`re trying to remove - it will be 100 times more potent on areas you DON`T want stripping
https://www.amazon.co.uk/Nitromors-All- ... 246&sr=8-3