The local spraying of the car is still difficult, If the color of the car repair paint can be adjusted to be very correct, it will bring convenience to the repair, but the actual operation is very difficult to paint the color and the old paint color is exactly the same, even if the ingredients of car topcoat are exactly the same, after spraying will still appear color difference. In order to reduce the color difference between the old and new paint, car repair painters through years of practice, accumulated a wealth of experience, only they can reduce the color difference to a minimum.