Why should oils be avoided before applying nail polish?

Oils should be avoided before applying nail polish primarily because they can interfere with polish adhesion. When nails are coated with oil, it creates a barrier that prevents the nail polish from properly bonding to the nail bed. This lack of adhesion can lead to issues such as chipping, peeling, or lifting of the polish shortly after application, resulting in a less durable manicure.

Preparing the nails by ensuring they are clean and free from any oils or moisture is essential for achieving a long-lasting and flawless finish. This is why nail technicians often recommend using a cleanser or alcohol wipe to dehydrate the nails before the polish application. In contrast, the other options, such as enhancing color or causing staining, do not directly address the critical issue of adhesion, which is the key reason for avoiding oils prior to painting nails.