Which technique is commonly used to enhance the durability of nail polish?

The technique that enhances the durability of nail polish is layering. Layering involves applying multiple coats of polish, typically starting with a base coat, followed by two or more coats of color, and finishing with a top coat. This process not only adds depth and richness to the color but also helps seal the polish, creating a barrier that protects it from chipping, peeling, and wear. Each layer contributes to the overall strength and longevity of the manicure, making it a fundamental technique for nail technicians aiming to provide a lasting finish to their clients.

The other techniques mentioned do not serve this specific purpose. Drawing usually refers to adding designs or artwork on the nails rather than improving durability. Etching typically involves creating patterns or textures in the surface of the nail or nail enhancement but does not enhance polish durability. Staining refers to a process where color is absorbed into the nail but does not relate to polish application techniques for durability. Therefore, layering stands out as the most effective and widely recognized method for ensuring nail polish lasts longer.