3m adhesive remover, pick it up at the local auto body shop or specialty store, dont think autozone has it. Not the spray shit either the stuff that comes in the pourable red metal container i think its like a quart. works awesome.
Tried Goo Gone when I debadged my car. It worked but not as well as everyone who raved about it had said. Took a lot of elbow grease and cleaning to remove the streaks it left behind. I attribute most of the success to using my fingernail on the adhesive residue. As mentioned previously, 3M adhesive remover works great. Have used it on other projects and it worked well.