Sunlight contains ultraviolet rays that can damage the surface of your car. If you live in a sunny place, your vehicle can suffer from fading, chipping, and other weather damage. It is important to protect your vehicle from sunlight. While it is true that trimmers are designed to operate in any weather condition, you need to begin with a clean and dry surface. Check the thermometer to ensure that the temperature at the time of painting is below 95 degrees, otherwise the paint will be scorched by the sun.