In retirement, Newman was able to fully devote his time to portrait painting, as well as sculptures in wood and aluminum. His aluminum sculpture, one of the first U.S. memorials to the six million Jews martyred by Hitler, was unveiled in 1963 at the Kansas City, Missouri Jewish Community Center; the keynote speaker at the unveiling was former President Harry S. Truman. His dioramas and miniatures were exhibited at the Boston Children's Museum, 1939 New York World's Fair and the Peabody Essex Museum.