This is a combination of solvent in the initial stages and dry paint (no medium or solvent) in the final stages. The dry paint does allow very light and delicate effects. I like this in paintings especially watercolours but its not common in the heavy medium of oils.
In my next experiment I will try and be less graphic and more painterly. This will be difficult for me as I like lines in the structure of my paintings.
Here is the video of this painting. See you soon.