if there like sticker badges like the micra name on back of your car etc ive heard that using a hot hair dryer on the stickers help loosen them off so u can peel them off easy then use some cheap face wipes to get the sticky gunk off. should work ive gota do that to mine as got gunk on one door from a missing door bumper lol as might put new bumper on haha. hope that helps you though. have a good day