Then ......... Bug and Tar Remover might work. Otherwise, you can try one of the various less toxic adhesive removers out there like 'Oops'. Something like 'Goof Off' would be a last resort since it's pretty strong stuff and might damamge your clear coat.
rubbing alcahol works too, but probably not the best way to remove BIG stickers. I used it to take off the alarm stickers.
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