Hi!
I would like to share with you this demo video where I show you my varnishing process for an oil painting.
Oil paintings in general, need to be varnished to prevent the paint from getting dirty with dust particles and other things suspended in the air, and in addition to protecting it from the ambient humidity.
The varnish also fulfills the function of equalizing the intensity and brightness of the different colors of paint applied.
Have a nice day!