To match the beautiful Jet Black iPhone 7, we made some special super-polished ElevationDocks with some special anodizing to match the finish. Apple may make the finish look easy with their robotic polishers in fluffy media and mid-anodizing magnetic polishing... we can tell you it's definitely not easy and have a lot of props to them for making such a beautiful and delicate finish.
For us, we are hand polishing them in 10 steps of coarse to fine media. And we iterated our anodizing process to keep it shiny, non-cloudy, and hard. And we put some turtle wax on for good measure. If you look really closely there are micro-size scratches in the finish, but they are not visible at useable lengths.
It looks absolutely stunning.