Which of the following methods is not considered a standard finishing method?

Drilling is primarily a machining process used to create holes in a material, rather than a finishing method. Finishing methods are techniques employed to improve the surface quality and appearance of a material after it has been shaped or formed. Common standard finishing methods include grinding, which enhances surface smoothness; painting, which adds protective or aesthetic properties; and polishing, which further refines the surface to a high gloss.

In contrast, drilling focuses on preparing the material for further use, such as assembly or fastening, rather than finishing the surface. Therefore, in the context of finishing processes, drilling does not belong to the same category as the other options listed.