Hot water can be used to repair certain types of car dents, but this method is only applicable to plastic body parts, such as bumpers or side skirts. Pour hot water (approximately 80°C to 90°C) over the dented area. After the plastic softens due to heat, gently push from the inside or pull outward with a suction cup tool. Once cooled, the shape will be restored. This method is low-cost and simple to perform, but it is ineffective for metal parts. Additionally, excessively high water temperature may cause plastic deformation or paint damage. The former uses optical refraction and lever principles to push from the inside while preserving the original factory paint, whereas the latter is suitable for severe deformation but requires repainting. If the dent involves paint cracking or structural damage, seek professional repair to avoid exacerbating the damage through DIY attempts.