You have the right to choose your repair shop. Your insurance company can not require you to go to a particular repair facility.

Unibody cars require more re-enforcement than Rigid-Chassis Vehicles

That having an accident can Null your Vehicles Warranty.

If you have a plunger in your house, you have a tool that can remove most dents from doors and panels

There is no legal requirement that you obtain more than one estimate for your vehicle repairs.