Are you soaking the backing paper thoroughly with water (possibly with an additive that lower the surface tension). It makes it much easier to remove. You just need to pierce the top layer by scoring/paper tiger/scraper. There's a product called dif you can use to clean up the adhesive residue.
Are you soaking the backing paper thoroughly with water (possibly with an additive that lower the surface tension). It makes it much easier to remove. You just need to pierce the top layer by scoring/paper tiger/scraper. There's a product called dif you can use to clean up the adhesive residue.