If it is under the clear coat you're basically ****ed, that is unless your willing to scrape / sand through the coating, remove the label and then reapply the clear coat. A lot of trouble for a simple little sticker.
If its on top, which is probably the case, then there are a vareity of options. Goo-Gone, WD-40, scraping with a credit card. I used a hair dryer to heat it up till it slid right off, then some WD-40 to clean off the goop.
PS: Props to MarkHR, the 2900 x 1400 pic was hilarious !!
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.