This video shows the midde and last parts of step 5, polishing #4  gold with abura tonoko + ishiko + jozuri on  a Karatsu tea bowl.  Abura tonoko is made with tonoko mixed with oil, usually  I use vegetable oil.  Ishiko is a ground stone applied with oil, and a combination of 3 polishing compounds.  To see step 5 see https://zac.wnz.mybluehost.me/website_a640e8d6/?page_id=225

For more on traditional, lacquer based kintsugi see kintugi.com or https://zac.wnz.mybluehost.me/website_a640e8d6/?page_id=225