When describing metal finishes, what does a higher score on the polish scale signify?

A higher score on the polish scale signifies a higher luster, which indicates that the metal finish has a greater reflectivity and shine. This is a direct measure of the surface smoothness and clarity, where a higher score means the metal has undergone more extensive polishing and refinement processes.

In practical terms, an item with a higher polish score is often visually more appealing and may be considered more desirable, especially in applications where aesthetic quality is crucial. Finishing techniques that lead to a higher polish score remove imperfections and provide a smoother surface, resulting in enhanced light reflection.

The other options relate to different attributes or quality levels that do not accurately describe the implications of a higher polish score. For instance, lower quality would imply a rougher or less refined surface, standard quality doesn't convey the highest level of finish, and opaque refers to a lack of clarity or light reflection, which contrasts with what a higher polish score represents.