I have done a quite a bit of oil painting but there is really little to explain about my technique:
The procedure is known well enough. I create reference pictures - drawings, photographs - make a composition with these and draw a sketch on canvas. I paint first in thin, then in thicker layers of paint until the work is finished. A painting can take weeks to complete, as I also have to earn my daily bread...
In the past few years many artists have switched either partially or completely to digital media . I am no exception. I like to draw digitally as a basis for painting. To the left is an unfinished "pencil" drawing for the portrait of Frederick Douglass.This is done with a pen on the screen in the photograph above which can be seen behind the jar of brushes. The procedure is very similar to drawing on smooth paper except that you cannot accidentally smudge the drawing with your hand and erasing is cleaner.
Sometimes I paint in the traditional way, but digitally.
I chose a type of brush or create my own - soft, bristly, broad, narrow, with thick or thin paint application, just like artists have done with brushes for centuries. I then paint flat areas of a medium tone, usually adding grades of shadows before finishing with light and highlights. Here are two phases in a portrait of George Harrison as an example. There is no smell of turpentine while I work and I don't have to wear an apron.