Here are stages of a painting I did for a friend last spring. I did not post it at the time because it was a surprise gift.
I've painted this in what I call the "classical-layered" method. As you can see, I painted in stages, building one layer upon another, and letting each successive stage dry before applying the next. I applied those in extremely thin coats, so as to build, rather than obscure what is beneath.
I have not included all the stages, but hopefully you can get an idea of how I do it. Below are a few very short videos showing how I begin.