Just done this very exercise on my '65 Fairlady restoration.
The trick is to find a Paint Shop or Body Shop owner who is prepared to have you around for the duration.
There are all sorts of problems with that, not the least is the OH & S aspect as you would know.
If you have your own car to work on and pay for materials and booth time, like I did, you can learn a lot and not compromise a customers car.
I was very fortunate that Travis took me on board and tutored me through the whole job.
Still cost a lot but the finished article is great
It's not what you know, but who you know, when it comes down to it