This video shows the application of red lacquer in preparation for gold.
Step 1a refers to this page, https://www.kintugi.com/?page_id=225
For more on traditional, lacquer based kintsugi, see kintugi.com
Here are some photos of 2 pieces I am doing. Both are very old. The celedon is from between 960-1127 AD and the Imari is from about 1700 AD. Usually it isn’t possible to see the porcelain body of pieces that age but on both of these it is possible.