If the paper negatives can be removed and stowed in a changing tent, they should be able to be processed like any piece of paper, I think.
If there was a pinhole version of one of these that would fit into a changing tent, I am sure that the experimental photography teacher at my school would love to have one available for students in the class. Maybe 8x10, and we can make the pinhole ourselves? It also would not need to focus, or have a ground glass. Or maybe she would prefer the lens, focusing screen, and focusing ability. I will ask her and get back to ya. The huge changing tent would surely cost more than the camera!
Just for my information, is one sheet of black foamcore able to stop light, or do you use multiple layers or additional coatings on the foamcore? What tape to you use?