You must be painter, Joseph K. I'm just relearning these things. I hadn't oil painted in years. It can get quite technical, compared to water colors or acrylics, which I find interesting. At first I just went to the art supply store and bought a bottle of regular varnish for oil paintings, but when I got home and started reading about how to apply it, realized the paintings wouldn't have time to completely dry (6 months at least), and that I would need to use a Retouching Varnish instead, so I returned to the store and exchanged it. It's kind of fun playing with these materials. I like the slow, deliberateness of oil painting. Lots of time between layers to think about what you're doing. The need for paint to dry before you go over it with a different color layer makes you take your time. I have 6 more paintings to do, but three are already half done or more, so I really just need to come up with three more ideas. I may do another of a single parakeet (instead of a pair of them). I like how that first parakeets picture came out.
I should mention that all the photos I've posted are of unvarnished paintings. They look a bit flat compared to the final, varnished versions.