First of all, generally speaking, basically all car bumpers are plastic. Sometimes you don't pay attention to scratches when driving. The paint will come off, and the heavy one will be damaged. If it is damaged, the general owner will choose to replace it. Cheap is ok, but it usually costs several thousand yuan to change a bumper in 4S, which increases the cost of car use.
In fact, many plastic bumpers can be repaired now. Generally speaking, as long as there is more plastic and the gaps are aligned, it can be welded. In the past, plastic covered electrode was baked and melted together with a hot air gun. Because many materials are different, they can't be completely blended, and they are thinner and easier to stick when polished. Can't help it.
But now there are more and more tools, including nail guns, but they are not popular. I've seen many 4s without them. It's simple. First, align and clean the gap in the bumper. A nail using a nail torch. Heat is fixed in the middle of the gap. It is very strong, just like reinforced concrete. Finish them in order first, and then polish them with an electric soldering iron to prevent the nails from falling out or rusting. Then polish it clean and scrape off the putty. After polishing, the paint is well painted. Finally, the effect of the repair is still very good, and the owners are also very satisfied, especially those parts that are difficult to buy or expensive cars, which usually take 200-300 yuan to repair. If the car bumper is worthless, you can choose to change it to a new one. If your bumper is original, you'd better repair it. Of course, most situations can be solved by themselves. I hope everyone will not encounter this situation.
To sum up, I believe you already know whether the damaged bumper can be repaired. You are welcome to express your opinions in the comment area, and Bian Xiao will also interact with you in the comment area.