Bumpers are the first line of defense against minor fender benders and scratches, but they aren't as invincible as you might think. When it comes to bumper damage, it's important to know which types of damage need repairs and which can be fixed with a little DIY help. Here's a look at some of the most common types of bumper damage and how to tackle them.  Dents And Scratches Your car's exterior is bound to get scratched or dented over time, even if you are extra careful when parking your car.