First, we can pour some boiling water on the dent. If there is no boiled water, you can use household hair dryer, compressed air, dry ice or even hot melt adhesive and rubber plug as tools to repair the dents on the vehicle surface. If the bumper is not easy to disassemble, or it is not sure whether it will affect the paint surface, the method of pouring boiling water is a bit troublesome. It is best to give it to professional technicians.
In the past, the front and rear bumpers of automobiles were all stamped with steel plates into channel steel, riveted or welded with the longitudinal beam of the frame, which was far from the body and unsightly. Later, engineering plastics were widely used in the automobile industry. Today, the front and rear bumpers of cars are all plastic.
Repair principle Secondly, GM plastic bumper consists of three parts: outer plate, cushioning material and cross beam. The outer plate and buffer material are made of plastic, and the cold-rolled plate is punched on the cross beam to form a U-shaped groove; The outer plate and the cushioning material are connected to the cross beam. In fact, the bumper is made of plastic, first of all for the safety of pedestrians on the road. Secondly, plastic materials are more practical. Most bumpers are made of elastic materials with good impact resistance. In other words, small problems are usually easy to solve. Even if the paint falls off, it will not rust, and it is not difficult to repaint it, which is easier to repair. This is also the need of automobile design and production. Nowadays, automobile production is batch and modular, and many parts will be designed to be lightweight, corrosion-resistant, easy to process, easy to form, easy to maintain and easy to replace.
Finally, don't think that the plastic parts in the car are unsafe. In the case of collision, the high-strength materials used in the car body can resist the strong impact force, and the car bumper plays a role in absorbing and slowing down the external impact. Used to protect the front and back of the body, it also plays a buffering role. The overall safety of the car and the overall coordination that should be paid attention to do not mean that the harder the parts are, the safer the car will be.
To sum up, I believe you already know whether the dent in the bumper can be repaired.