Spray painting a car panel will allow you to remove scratches or replace faded paint from one area of your car. Removing the car panel is not necessary in order to paint it properly, as long as you tape off the panel from the other parts of the car.
Tape off the car panel that you want to paint. Use newpaper to cover the parts of the car that you do not want to paint and painter's tape to secure the newspaper. Make sure that you also cover and tape your interior if you are painting a door panel so that the spray going onto the sides of the door will not paint the inside of the car.
Sand down the paint on the panel. This will help the new paint to adhere and will also get rid of any imperfections in the current paint job that could affect the new paint job. Wipe down the panel with a lint free towel to remove paint and sandpaper dust.
Spray the panel with primer in short, fast and even strokes. Slow strokes can cause dripping to occur. Make sure that strokes overlap to reduce the appearance of lines. Allow time in between coats for drying. You will need two coats of primer. If you are painting a door panel, make sure not to forget to open the door to spray the inside edges. Leave the door open for subsequent paint applications.
Spray the car with the paint colour that you desire. If you want to paint the car its original colour, call a car dealership that sells your brand of car and ask the service technician for the exact original colour that came with your vehicle's year, make and model. You can then match that colour at the auto parts store or paint supply store. The more coats you apply, the deeper the colour. Allow time between coats to dry before applying the next coat. Use short, quick, even strokes with overlap between each stroke.
Spray one coat of glossy paint to give the panel a finished, shiny look. Give the glossy coat 24 hours to cure or dry completely. During this 24 hours, keep your care safe from sunlight exposure, wind and rain.