For the mural painting at the bottom of this post, I used all acrylic paint. It was a good choice because at the size of 7' x 7', I saved a lot of money by choosing acrylics over oils. Another reason I used acrylics is because of my style of painting which is unplanned, often requires lots of changes and repainting of certain areas. Because Acrylic dries quickly I could completely paint over an area without making a mess by having the paints mix. Also by thinning down the upper most layer I could achieve a nice semistransparent effect in some areas giving nice depth of color. With oil I would have to wait longer until the bottom layer dried. The downside, was that if I ever wanted to blend a new color with a layer beneath, I would have to either thin down the paint significantly, or remix the color below again.