👉 The term "burnish" can be defined as a process of increasing or improving something by applying a surface treatment or coating. This is often used in the context of exterior finishes, such as paint, varnish, or stain, which are applied to surfaces to enhance their appearance and durability. For example, when using a burnishing process on the surface of a metal object like a car body, you would apply a thin layer of polish or a clear coat to protect the metal from wear and tear