Machining acrylic is easy- if your shop guy can turn aluminum, he can turn acrylic. Same tools, same speeds (for the most part.)
Some caveats: don't use carbide inserts. You need a razor-sharp HSS tool. Keep the rake and angles the same for lathe turning, as you would on aluminum, but take a moment with a fine stone to give the edge good hone. Also, for stress points, like threads or shoulders, use as wide a radius as you can on the point. Sharp corners are likely to crack.
There's no trick to turning acrylic, as long as you're careful.