This is a process using an abrasive. It could refer to using a buffer (usually with a high grit of around 240) to shape and refine a nail coating or overlay. Or it could refer to using a 3 or 4 way buffer (of increasing grit) to bring an overlay or a natural nail to a shine
Pulido
![Nail Buffing](https://nailknowledge.org/wp-content/uploads/2020/12/buffing.jpg)