Car scratches eventually appear in a way of almost every car owner. There are many methods of dealing with them however painting it over with an auto spray gives the best result. If you have enough experience you will be able to paint over even a big scratch but a beginner also can manage to repair imperfections on his vehicle. Here are the steps to follow:
First, it is necessary to clean metal from dirt and rust. Dirt is removed by washing the panel with soapy water. When dry, sand out the scratch and surrounding area with sandpaper. Then you need to apply putty on a surface. It should consist of two components (with a hardener). Do not choose epoxy putty otherwise, it will dry for 24 hours. Use rubber or thin metal pallet for alignment.
It will take 20 minutes to dry up with a temperature of 200C (392F). At this stage, you may also use auto filler primer that is specially designed to fill scratches and imperfections and perfectly replaces putty. It can be found in auto stores but if you are after budget repair - putty will work just fine.
Next step, condition the surface with sandpaper of different calibers starting with sharp and then moving to a fine one. The panel should be ideally smooth to the touch. To make it this way use ultrafine 2000-3000 grit sandpaper and running water.
Now it is time to apply a primer. When primer layer is dry, you can start painting. To make sure the colour will match your car, enamel should be selected under number specified in the service book of the car. If you will paint your car in garage, take care that dust and moisture in it would be as little as possible otherwise fine motes will definitely get on a fresh paint.
Use masking tape and thick paper to cover parts that are not going to be painted. Make several light applications of a spray paint on a surface. Paint is put in two layers. First - thin, second - thicker. Time interval before applying second layer is 6 to 8 minutes. Average time of drying is about 2 hours, and full fixing of paint takes 24 hours.
When paint is dry, you can remove paper and masking tape. If you notice some imperfections such as drips or rough edges, you can fix it using ultrafine sandpaper. When finished apply a top coat over the painted surface and let it dry. There is no scratch anymore!