Depends on whether it is epoxy or polyester resin. Epoxy is much more resilient to solvents. Methanol should be good on both but acetone may well dissolve polyester so try it on a bit that doesn’t matter to start with. Don’t use nail varnish remover as a source of acetone if you try this as it is oily and nothing will ever stick again! Acetone would be my favourite but do be cautious. Good luck, David, UK.