
Maintain an appropriate position between the hair dryer vent and the car dent: Point the hair dryer vent at the car dent, keeping a moderate distance. After using the hair dryer, prepare a cover for the dent: Aluminum foil can be chosen because of its excellent heat insulation properties, which help retain heat over the dent area as much as possible. To prevent burns, wear thick gloves and use a clamp to place dry ice on the aluminum foil. If the dent area is small, there is no need to move the dry ice back and forth. After some time, if you hear a metallic sound, it indicates that the car dent is returning to its original shape: This works based on the principle of thermal expansion and contraction.

Last time a small dent was made on my car roof by a falling branch, which really broke my heart. At the repair shop, they performed a paintless dent repair without needing any repainting. The technician first softened the car paint with a heat gun, then gently pushed the dent out from the inside using a specialized pry bar. The whole process was extremely meticulous, requiring repeated angle adjustments under the light. They said the key to this type of repair depends on the location; if there are no wires inside the roof, it can be fixed in just half an hour. My dent was about the size of a coin and cost a little over 400 yuan, which is half the price of traditional bodywork and repainting. I suggest you don't delay fixing small dents, especially when parked outdoors, as bird droppings or tree sap can seep into the dent and corrode the paint. After the repair, be careful not to blast the repaired spot with a high-pressure water gun when washing the car.

For the roof dent, I suggest first assessing its size yourself. If it's smaller than a fingernail and the paint isn't broken, you can solve it by purchasing a dent repair suction cup. The type I use comes with strong adhesive. When operating, first clean the roof, cover the dent with a heating patch (don't use a lighter directly as it may burn the paint), then slowly pull outward with the suction cup. Apply even force - too much force might deform it. After repair, wipe off any adhesive residue and apply a layer of car wax. DIY repair only costs about ten yuan, but it only works for flat areas. If it's near the sunroof edge or roof reinforcement, it's better to have it handled by a professional. The thin sheet metal on the roof is prone to rust, so remember to dry it promptly after rain.

For roof dents, paintless dent repair (PDR) is the preferred method. Last week, my car got dented by an outdoor AC unit while parked in the residential area. The repair shop used magnetic suction tools to fix it. The principle relies on electromagnetic force to pull the dent back into shape without touching the original paint. The technician mentioned three requirements: no creases on the dent edges, undamaged paint, and access to the back of the dent from inside the car. For SUVs with higher roofs, the interior headliner might need removal, while sedans usually don't. The repair quality depends on skill—experienced technicians can achieve 99% smoothness. Pricing is per dent, starting from 200 RMB for small dents. Avoid DIY glue-pull tools sold online; improper use can damage the paint. Regular roof inspections are essential.


