Our letters are very easy to install, you'll need about 10 minutes. We made a video, please take a moment to watch it:
Protect from water and temperature extremes for 24 hours.
If you need to remove the letters for any reason, use a piece of dental floss or lights fishing line to slide it behind the letters. That will break the adhesive bond. Any remaining adhesive on the car can be 'rolled' off with your thumb. Warming the area with a hair dryer will help speed up the process.