Here's a tip to remove the double back tape adhesive after removing emblems or wheel weights.
Go to your local auto paint supplier and get an adhesive eraser. It's a disc about 4 inch diameter and a half inch thick. It has a shaft attached to chuck it in a variable speed drill. This will take off all kinds of old adhesives without harming the paint. Just run it at low rpm and it will "erase" the glue easily. I use these all the time to get adhesive off motorcycle parts when I'm prepping them for paint. Just used one today to take the adhesive off my wheels where old wheel weights had been. If you don't have a local supplier you can find them at some auto parts stores or at
www.eastwood.com