Starchem stripper softens it after a while but you have to plaster it on then cover in cling film, it's okay for the intricate areas but a lot of waiting around.
Hi, If it's such a git to get off do you really need to? If there are problems underneath it's adhesion would be compromised and it would come off easily. Just spot repair damaged areas and overcoat with a product of your choice to have an even finish.