I've been battling with Akasa Paxmate for the past few days. First I removed the black stuff; combination of pulling it off and using a plastic scraper to tease it away from the adhesive backing. Then I was left with the adhesive to remove. Nightmare I thought, until .... I had a brainwave! I figured that car products don't harm paint/metal, and that tar is about the nastiest thing you could get on your car, so dug out that bottle of AutoGlym Tar Remover I bought about 10 years ago and used once! It works a treat. Sprinkle the liquid on and let it penetrate into the glue. Then applying firm pressure rub top layer of glue off with a piece of kitchen roll (I recommend Bounty) - or use the plastic scraper thing from before. Then sprinkle the stuff on, leave for a bit, then using the kitchen roll remove almost all the remaining glue. One final application does it and a quick wipe over removes all the glue. Job done. Although I would recommend washing the area with a car shampoo to remove the last of the Tar Remover.