After the rings come out of the etch solution, he then neutralizes them and cleans the rings. The bottoms of the rings are then lightly sanded on a flat surface to bring up the shine. Once that is done he can put the rings on the lathe and manually sand and polish the outer edge.
Looks like today was a good day. The knurled Fenja and titanium Dynaminis are assembled and tested. They all passed the testing. Have a great rest of your weekend!