When is it appropriate to apply nail polish directly on natural nails?

It is appropriate to apply nail polish directly on natural nails after ensuring they are clean and properly prepped because proper preparation is crucial for achieving a lasting polish application. This preparation typically includes cleaning the nails to remove any oils, dirt, or debris that could prevent the polish from adhering effectively. Additionally, buffing or shaping the nails may also be part of the prep process to create a smooth surface. When the nails are properly prepped, the polish adheres better, looks smoother, and lasts longer, providing a more professional finish. Neglecting this step can lead to chipping or peeling of the polish, which would detract from the overall appearance and longevity of the manicure.