Door Protectors Available here. It's a common occurrence in car parks that when a door opens too close to your vehicle, it damages your car or truck's paint job with scrapes, scratches or dings. When you install door protectors, you provide a barrier that insulates your vehicle's doors from the impact of other vehicle doors opening too close to your car or truck. Door protectors are usually self-adhesive strips of rubber, plastic or chrome that attach to your vehicle's door to provide this buffer from other nearby cars coming into too close contact. They can be custom cut to fit the length of your car or truck doors.