I just removed the caution/safety decals from the tank on my new bike. I heated them with a hair dryer to soften the adhesive, and they came off with some patience. I used Goo Gone with a microfibre cloth to remove all the adhesive residue. However, the spots where they used to be are somewhat shiny compared to the rest of the matte finish tank panel. I thought it was perhaps stubborn residue, but nope. Any thoughts?