Clean up! Smooth Shiny Bottoms

Cleaning up the bottoms of cups and mugs to a glass smooth finish. Polishing the bottoms. The bottom of the form should be finished in a professional manner. This process is easy and provides a glass finish to the bottom of a ceramic form. And it is safe.     I use the diamond sanding disc that are designed for smoothing granite from Amazon:  https://www.amazon.com/dp/B074Z2V9RN