Few women have the dexterity or firmness of hand to execute the same quality of manicureas a professional.in one touch, the correcteur removes the eventual nail polish smudges on the nail contour or on the finger tips and erases any manicure mistake. it comes as a felt-tip pen filled with solvent.how to useuse the felt-tip of the pen as an eraser. regularly wipe the felt-tip clean with a tissue paper. when the felt-tip is completely stained by nail polish, replace it with one of the spare tips, included.