What is the effect of car scratch painting?

After driving for a long time, there will inevitably be some scratches. Two days ago, a fan left a message in V letter saying that "his car was scratched, and his friend told him that the whole side of the car needed to be repaired". Is it really necessary to repair such a small scratch? Let's talk about the touch-up of car paint today. What kind of scratches need touch-up paint and what kind of scratches can be ignored? ! (PS: There are pet powder benefits at the end of this issue, so be sure to look at the back! )

To understand different scratches and what kind of touch-up strategy to adopt, we must first understand the layering of the original car paint surface. The car paint sprayed on the automobile production line is generally divided into four layers, namely electrophoresis layer, middle coating layer, color paint layer and varnish layer. These four paint layers are isomorphic to form a car paint layer visible to the naked eye, commonly known as original paint.

Electrophoresis layer is a "base", which is directly attached to the metal body, and its main function is to prevent corrosion. The intermediate coating coated on the electrophoretic layer can improve the corrosion resistance, and its quality directly affects the adhesion of the color paint layer. The paint layer determines the color of the car we see. The varnish layer is on the outermost layer, and its main function is to protect colored paint, improve hardness and prevent slight scratches.

From the above knowledge points, we can know that the varnish layer has no color. If it is a slight scratch, it only hurts the varnish layer and does not hurt the primer (color paint layer), then simply polish and wax it, and there is no need to touch up the paint. Because this car is not a "factory paint" after touch-up, its value may be affected if it changes hands later.

But if you hurt the primer, you must repair it. Because the steel plate is almost under the primer, once the primer is damaged, the steel plate below may be corroded and rusted soon. Unless the injured part is the front and rear bars of plastic parts or a new generation of aluminum alloy parts in Qi Jun, there is no need to worry about rust, which only affects the appearance.

As for how to judge whether the primer has been hurt, I'll teach you a simple method. Just touch the scratch with your hand. If you can obviously touch a "scar" with obvious hand feeling, it will basically hurt the primer. If you just feel a little rough and don't feel obvious "scars", it's generally not a big problem.

Generally speaking, the whole paint repair is better than the local paint repair! Although it is a small area, local touch-up paint can protect precious original paint better than whole painting. However, local touch-up paint is prone to color difference. In addition, there is no difference between the local touch-up paint process and the whole touch-up paint process, which requires high technology and color difference. Good partial touch-up paint will not be much cheaper than full touch-up paint in price.

If you need to touch up the paint, it is recommended to go back to the 4S shop for professional touch up. First of all, the 4S shop uses the original special paint and has a special supporting process, so the quality is more guaranteed; Secondly, in order to ensure the painting effect, 4S shops will be equipped with expensive dust-free workshops and painting rooms, and the equipment support will be more professional; In addition, the relevant personnel of the 4S shop have been trained and certified by the manufacturer, and each maintenance has a fixed process and flow, so the operation is more detailed and standardized.

Therefore, if the car paint has obvious scratches or damage, it is generally recommended to take out insurance and go to the 4s shop for maintenance. This is the simplest and wisest choice.

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