What is engine turning finish?

Engine turning finish, also known as jeweling or damascening, is a decorative surface treatment used on metal surfaces. It involves creating a pattern of overlapping circles, typically by using a machine-driven abrasive tool. The resulting pattern is often described as "bursting" or "radiating" from a central point.

Engine turning finish was originally used on high-end firearms and watches in the 19th and early 20th centuries. It was also used on automobile and motorcycle engine components. Today, engine turning finish is still used in these industries, as well as in the production of luxury items such as jewelry, pens, and lighters.

The pattern created by engine turning finish can vary in size and density, depending on the desired effect. The finish can be applied to a variety of metals such as steel, aluminum, and brass, and can be further enhanced by adding color or other surface treatments.

Engine turning is a labor-intensive process that requires skill and precision. The resulting finish is both visually appealing and functional, as it helps to reduce glare and reflectivity on metal surfaces.