They can include rustproofing, fabric protection, paint protectant, or VIN etching, in which the vehicle identification number is etched onto the windows to deter thieves.

• 这些附加商品包括抗锈，织物，漆面保护剂, 和汽车蚀刻，汽车蚀刻是将汽车的识别码蚀刻在车窗上来防止窃贼。