The nail polisher is an essential tool to perfect your manicure, especially for those who do not often wear varnish. With its many faces, it offers more possibilities than the nail file to take care of your nails. Find out how to use a nail polisher and how to choose the right one. How to properly use a nail polisher? Know before you start: It is recommended to prepare your nails. We advise you to feed them with sweet almond oil or castor oil. Then, start filing your nails with the side with the coarsest grains to give them the desired shape.