Benton was a part of the Beatnik movement in San Francisco during the ‘50s and ‘60s working as a sign painter by day and an expressionist artist (painting) by night. In 1961, he had a solo exhibition at the California Palace Legion of Honor, showing his portraits of fellow artists like David Simpson and William Morehouse. Frustrated with the limitations of paint on canvas, Benton began to work with movement in geometric pattern pieces and boxes which he was familiar with from his work in commercial signs. This was at the beginning of the kinetic movement; Benton worked largely in isolation, unaware of other efforts of kinetic artists. His early works of this series were exhibited at Gump’s Gallery in San Francisco.

In the late 1970s, he abandoned kinetic art, switching to a more traditional media for sculpture: bronze and steel. These works are designed to be viewed from all angles and have often been characterized as new constructivism; he worked in this style until his death in 2019. Some of his most popular series in this style are the Folded Square Alphabets and Numericals, Folded Circle, Donuts, and Steel Watercolors.

Benton has large-scale steel sculptures permanently installed world-wide including San Francisco’s Louise M. Davies Symphony Hall, Grounds For Sculpture park in Hamilton, NJ, the city of Cologne, Germany, the city of Berlin, among others.