Then came the filling coat. It was my first time applying shellac in my life to any object so I was curious if I can do it. I worked with a brush by the way.
I did a good a few coats (actually 6 coats), each has 7 days between them.
At last it was time to give it some color. I applied a 1000 grit sanding with a baby-oil (odorless, thin, evaporates quick-ish and contains paraffin) then the surface was ready to color.