Highly reflective frames mostly show reflections of their surroundings, not just the frame itself. So the key is to control everything the frame “sees.” Use large, soft light sources or big diffusers to make reflections broader and less harsh, and place white foam board around the subject to create clean bright reflections. Use black cards/flags where you want to add shape or reduce unwanted glare.

There isn’t a single formula: some contrast is often desirable, because a perfectly even glossy surface can look flat. The goal is to control the highlights, not necessarily remove them completely.

A standard polarizer generally won’t solve reflections on metallic finishes; polarizers are mainly helpful for non-metallic reflections. They may help with glass or other non-metal surfaces in the scene, but not the metal-like shine of the frame itself.

In short: enlarge and soften the light, control the environment with white and black panels, and adjust the reflected shapes until the frame looks intentional rather than patchy.