This video shows step 7a of metal finishing for traditional, lacquer based kintsugi. Step 7a is the second  polishing  of jozuri. The silver is #2, #3, and #4 which I applied and then polished with a polishing tool.  For more see https://www.kintugi.com/?page_id=225
For more on traditional, lacquer based kintsugi see kintugi.com