No more sanding for me! I have done it a few times with a long flat sanding block, and then an orbital sander. I did it just to keep the machine a bit cleaner. The zinc comes off really quickly under the bearing load so I wasn’t worried about surface finish. It does make a nasty mess when it flakes off though. Now that the 1″ version is done, I went and got a bunch of 1″ OD stainless and that stuff is more rigid and smooth as silk, no sandpaper needed.
I actually picked it up at ABC supply When I was dropping off your box! Cool place.