If the sag under the car is not serious, the car can be restored to its original state with sheet metal. When using sheet metal, you can use various tools to restore the prototype of the car. If the dent is serious, you need to replace the underbody directly, and you can't use sheet metal. The repair of car dent is to repair the sunken part of car paint to its original state. In most cases, the concave part of the car can be restored to the original state of obtuse or acute dent. Automobile dent repair technology includes traditional sheet metal repair technology. Sheet metal repair technology is to repair the deformed part of the automobile metal shell, then restore the deformed part to its original appearance, and then spray paint similar to other parts. Automobile dent repair technology can reduce dents caused by external impact. Advanced repair technology greatly reduces the repair time of automobile dents, so that the maximum repair range of automobiles can reach more than 90%.