Mr. Jaeger, or anyone, I'm not familiar with a lens test projector - can they project through a wide variety of lenses regardless of the lens mount, or is the test projector restricted to testing lenses of a particular mount or for which it has the appropriate adapter. Thank you.
A typical lens test projector has interchangeable mounts, mine for example came with 6 different mounts, and I've custom made more. Or you can adapt the lens itself to a more common mount, though then you can introduce errors. They are a professional tool for lens technicians and rental houses, and can cost around $20,000 new. They are essential when we work on everything from student lenses to the optics used on feature films.
I mentioned it simply because it is the best way to quickly analyse a lens, it will tell you everything from back-focus setting, to optical aberrations, to whether internal elements are fogged, to mechanical issues.
But when it comes to vintage optics like that Angenieux zoom, which you can assume will be lower in contrast and less sharp than a modern lens, I wouldn't worry too much about inspecting the glass. As I said before, fine scratches, dust, and other blemishes won't show up, they'll just make it slightly more low-con than it already is, and very few vintage lenses are without fine scratches, dust or blemishes. I'd avoid a lens with fungus (spidery lines) or big chips or deep scratches or corrosion, but otherwise just see how it performs. Outside of having a technician check it on projection, or shooting a test, that's all you can really do.
The important thing with a zoom is the back-focus setting, or distance from rear element to film plane/sensor. This needs to be exactly set so that the lens stays in focus as you zoom from long to wide. If you find the lens drifting out of focus as you zoom out, this is what most likely needs to be adjusted, and should take a lens tech no more than an hour to do, maybe only 15 minutes for some zooms. (Don't focus at the wide end and expect it to stay sharp as you zoom in, you need to focus at the long end where it's more critical and then zoom out.)