The touch-up paint of the outside repair shop is calculated according to the whole surface where the scratch is located. If the scratch is small, but it just spans two sides, then I'm sorry, it has to be calculated according to the price of two sides. Moreover, according to the repair difficulty of each surface and the required materials, the price of painting outside is generally around 300-500 yuan. If the scratch is deep, part of the top coat has been hung off, but the primer and deformation are not hurt, then you can touch up the paint yourself and restore the paint surface. It's easier and faster to buy a complementary color pen and then touch up the paint according to the tutorial. The body primer is damaged or even deformed: if this is the case, the scratch is very serious, and if it is not treated in time, it will develop into rust in the future. In order to repair the body primer and deformation, it is necessary to grind off the car paint at the corresponding parts, then repair the sheet metal, and finally repaint each layer of paint. In this case, the maintenance cost is relatively high. If it is low, it is the price mentioned before, a few hundred dollars. If the repair area is large and the quality of car paint is high, the price can be as high as several thousand yuan.