I think you have received some excellent advice above and while I don't know what your expectations are, maybe let's talk this through a bit. Most accreditated Tech schools have a classroom / lab ratio of their time that is mandated by the State. Realistically, how much time and physical labor will they spending on your project?
For example, if there is going to be 4 students working on your project during a 2 hour lab, on the outside it would seem like you would get 8 hours of production time spent on your car but in reality, kids are probably each going to spend 15 minutes getting the project out and ready to be worked on at the beginning of the lab, ...and 30 minutes cleaning up their mess at the end of the lab, --and at least 15 minutes of texting/talking/horseplaying during that lab. That gives about 1 hour of "learning time" for them to actually work on your project. In the perfect world, that would be be 4 collective hours of labor per lab. How many days per week is the lab? How many weeks during the semester before the project goes from being 'cool', --to a project that is viewed as a 'pain' in those student's eyes??
If the entire project from start to finish were alotted 300 hours, I am of the opinion that a very large percentage of students, (and probably a large percentage of instructors too) do not have the desire, nor ability/stamina to stick with a project for that length of time. So if their lab time is two days per week, that gets about 8 hours a week of work from non-skilled workers. I probably should also add that students/kids are infatuated with power tools, ...and the manual labor in the necessary tasks such as hand sanding (which a quality paint job requires!) are not found to interest them whatsoever. Therefore whatever they can get accomplished (-good or bad) with a power sander is what will happen, and if the length of time the project is still holding interest with the students and instructor(s) will likely determine the quality of the project.
Now let me also offer that production materials and paint materials are very expensive these days. So if the labor is free yet the kids waste a lot of materials (because they ain't payin' for it!), it could easily cost you over $1,000 for P&M. In my thinking, you may be able to get an Earl Schieb or MAACO quality of paint job for less time, -less money, ...and it may actually turn out to be better quality. (I can't believe I am implying that an Earl Schieb or MAACO could be better quality than something else!!

) None-the-less, I said all of the above to offer another perspective for you to think through before you decide what is best for you.
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