How long will the primer rust when the car is injured? I want to wait a little longer to cope with the climate in Changsha.

If the primer is exposed for a long time, the car will rust. Processing method: 1. Generally, if the primer is not damaged by small scratches, or even the "surface layer" is only slightly "worn" or leaves some scratches, it can be polished. Basically restore the "original appearance". 2. If you can clearly see the primer or paint surface away from the exterior paint (sometimes you can see the metal part) after the "collision", you need to touch up the paint in this case. If the time is too long, it may cause internal "rust" and expand the "repair scope". So in this case, it is recommended to deal with it in time. 3. If the "bump" or "scratch" part is in the "plastic" part, such as the front and rear bumpers of some models, if individuals pursue beauty, they can touch up the paint. However, in some cases where the scope is small (which does not affect the overall beauty) or can be polished, there is no need to touch up the paint, and there is no "rust" (plastic parts) inside. 4. If it is "damaged" by "collision" or "scraping" to a "chrome-plated" part, it is recommended to replace the part in order not to affect the appearance (beauty) of the vehicle. Although this material can be plated again by electroplating, the cost of a single component is higher, so it is more suitable to replace the component directly.