Choosing an Auto Body Shop

Do you have ASE certified technicians?
ASE is the National Institute for Automotive Service Excellence. An ASE certified mechanic has been instructed and tested on how to perform maintenance on a vehicle. There are different areas of specialization for ASE certifications for different systems on a car. ASE certified mechanics aren't necessarily better mechanics but they take the job seriously enough to take the classes and tests required to become certified.
Who makes the final decision about the necessary repairs?
If I do not agree with my insurance company about the amount of damage or cost estimate can you help me understand my options?
Do you use original manufacturers parts or after market parts?
After market denotes a part produced for the vehicle by a company other than the original manufacturer e.g.
What warranties do you have on the parts and the body and paint work?
Will you provide a free loaner car while my car is in the shop?
A loaner car may be part of your collision coverage, but it is worth asking the question.
What happens if the work cost more than my insurance company's estimate?
Can you work directly with my insurance company to coordinate payment?