I'm a newbie here. Help me if you can please! I have removed most of what we all agree are the ugly airbag decals on the sun visors. However, what's left is an obvious grey area where the decals used to be. It's not sticky. It just appears to be printer's ink or whatever they use to screen those decals onto the visor. I have tried: acetone, denatured alcohol, comet, soap and water, Goof-Off, prayer, elbow grease, and sighing loudly. Nothing will get the remaining discoloration off. Any suggestions? Mini thanks!