I got a cracker of a 24 hours Le Mans door sticker in 2014 and have my tickets for 2017 Can you guy post where you get your sticker please it took me a long time to find my last set.
I have been stickering up my cars now for years, clean the car apply a coat of wax polish, fit the sticker a few days before using the soapy water method a day to dry and remove on the train/ferry back, don't rush it just gently ease off. No problems at all.