Dry ice can be used to repair small dents on car bodies, but specific conditions must be met and operations must be performed with caution. The principle involves utilizing the extremely low temperature of dry ice (-78.5°C) to contract the metal, combined with aluminum foil for thermal insulation to ensure even cooling of the dented area, thus restoring its original shape. During operation, wear cryogenic gloves and apply dry ice to the dent for 30 to 40 seconds. A metallic popping sound indicates successful repair. In such cases, professional panel beating or paintless dent repair techniques are recommended, costing approximately 300 to 500 ringgit. Note that dry ice repair is a physical process that won't damage the paint, but improper handling may cause excessive localized temperature variations, requiring guidance from experienced practitioners. While dry ice technology is also applicable for engine carbon deposit removal, the underlying physical mechanisms differ between dent repair and carbon cleaning and should not be conflated.
