1. Base Coat: This is the first layer applied to protect the nail from the color and prevent staining. It helps the polish adhere better and last longer.
2. Color Coat (usually two coats): This is the actual color of the polish. Usually, two coats are applied for full, even color coverage. Sometimes, depending on the color, one coat might be sufficient.
3. Top Coat: This is a clear coat applied over the color to seal it in, add shine, and help the polish chip less.
4. Quick Dry Top Coat: This optional layer is applied after the regular top coat to speed up the drying time and provide a smoother, more even finish.
Therefore, a typical nail polish application includes one base coat, two color coats, and one top coat, with the optional addition of a quick-dry top coat.