As a boy on a Kentucky farm, Dawn chopped faces in sandstone he found on the banks of a nearby creek, using a chisel, hammer and spoon.
He served with the British during World War I, then returned to the American film capital to work as a make-up assistant and part-time actor at Universal Pictures.
Two years later, he was assigned the task of giving life to three non-human characters—a scarecrow, a tin man, and a lion—in MGM's classic musical film The Wizard of Oz.
In 1943, he approached the San Diego Naval Hospital with an offer to help World War II soldiers whose faces and hands were disfigured in battle.
Dawn worked with many legendary Hollywood performers, including Laurel and Hardy, Greta Garbo, Mickey Rooney, Judy Garland, Bert Lahr, Ray Bolger, Jack Haley, Greer Garson, Clark Gable, Spencer Tracy, Katharine Hepburn, Lucille Ball, Ingrid Bergman, Elizabeth Taylor, Frank Sinatra, Gene Kelly, Ginger Rogers, Lana Turner, Fred Astaire, and Betty Hutton.