Store indoors or undercover whenever possible Wrap films (just like paint) are degraded by prolonged exposure to sun and atmospheric pollutants, particularly on the horizontal surfaces such as a hood, trunk lid, and roof. Whenever possible, store in a garage or at least in a shaded area during the day. At night, protect the car from dew or rain, containing acidic pollutants (a common problem in many large metropolitan areas). When a garage is not available, consider using a cloth car cover at night. If your wrap film starts to discolor or turn brown (caused by acidic pollution), immediately have a professional remove the wrap film from the vehicle to avoid staining the underlying paint.