There is an endless realm of items that can fall into the custom job category of car. Your local body shop can do everything from body kits to mufflers, and even paint jobs, provided they have the right supplies and equipment for the job. Some auto body shops have a better reputation when it comes to doing custom work as with everything else.
A good thing to keep in mind is the workload of the garage you plan on visiting at any given time. If your body shop is full of customers, they might be able to do the job very well, but it would be a long turnaround time.
After you’ve decided what kind of work you ‘d like to do with your car, you should ask one of the auto body shops that you have in mind if they can do the job. If you have a fancy car requiring special mechanical knowledge tools then there might be some garages out of the realm of possibility. It’s also worth investigating the auto body workshop you ‘re going to visit in terms of any grievances you lodged against them before taking your car in. The easiest way to do this is to look up complaints that are filed against the shop that concern you on the Internet.