So this is a detail from a new painting I have started (the abstract from Sunday's post was on the sideline today). I was unsure where to go with the colour behind the branches. So out came my trusty acetate. I learned this tip from fellow artist Laurie Wonfor Nolan. When you are faced with indecision tape a piece of clear acetate or mylar on your painting and paint away. Stand back and check it out. Remove the acetate and wash it off for the next time. Up top you can see me lifting the corner of the film. Below are a couple other colours I tried.
Presto. I made my decision and have started working into the background of the painting below.