"I've removed decals and stripes from new cars before but they were outside on a hot summer day in Texas. Don't be in a hurry. A hot hood and heated decal seem to be the trick.
To remove graphics or decals from your vehicles body is going to require a little bit of patience and a blow dryer. No we ARE NOT going to use a razor blade for this task. Start by setting your blowdryer to the Hot position and point at the edge of the graphic from a distance of about 2 inches. The goal is to heat up both the graphic and the glue beneath it to a temperature so that both can be removed simultaneously when you peel off the vinyl. It will take a little bit of practice to get used to it.
Start from one end of the graphic and move the blowdryer in a circular or a back and forth motion, covering about 6 inch area. Carefully try to grab the corner of the graphic and start pulling it off the surface of the vehicle and at the same time moving the blow-dryer ahead so the vinyl can be hot as you are pulling it off the vehicle. BE CAREFUL, THE VINYL IS HOT. Give your fingers a break after a few minutes. If you peel off the vinyl and you see it left the glue on the vehicle, try to heat it a little longer before peeling off the vinyl.
Once you are done removing the vinyl look at your vehicle and see if there are any spots of glue left. Don't worry if there is. From your local carparts store you can purchase Tar and Bug removers. Before using any of these products, TEST IT, to see if damages your paint or not. Even though they say it's to be used on your vehicle, you will still want to test it to see if damage will be done or not. If after testing all is ok, follow the instructions on the product to remove the residue that is left on your vehicle. When finished, wash and wax your car."