Which of the following actions is NOT typically done when polishing the fingernails?

When polishing the fingernails, applying thick coats is generally not recommended. The correct answer highlights that the practice of applying thick coats can lead to several issues, such as uneven drying, smudging, and a less polished appearance.

In contrast, applying a base coat is a standard step to prepare the nail surface and enhance adhesion, while using thin coats of polish is crucial for achieving a smooth, even finish. Finally, utilizing a top coat is essential for protecting the manicure, adding durability, and enhancing shine. Each of these actions contributes positively to the overall manicure process, while thick coats detract from its effectiveness.