Thanks everyone for your complements! It's a lot of fun working on them.
Terry, I do indeed do all my own polishing. I have a bench polisher set up in my workshop. It's very messy and kind of dangerous. So great care should be taken!!! When I rebuild one of these, I try to be thorough. I wash everything with degreaser before polishing. Some castings even require hand sanding. But I go through every screw, spring, bearing, gasket, washer...I even polish the screw heads! I especially enjoy working on the pre-516 models.