As long as no one does your home work for you
Is this a high school paper?
III. Demanding....(too vague)
Body man or body repairman, rather than body repairer.
Take a camera to some of the dealerships in your area, ask the manager if you can talk to one of his guys on the floor, they can be a cantankerous bunch, maybe he'll let you talk to an old-timer that would like to help you. Have a list of questions prepared before-hand to ask.
Local vo-tech may also be a good resource for info.