After removing chipped polish, trim nails straight across with steel clippers and smooth uneven edges with a fine-grit emery board or metal file. Opt for a slightly rounded shape to prevent painful ingrown nails, advises Choi. Then, lightly buff out ridges and any discoloration on the nail plate with the coarse side of a four-way buffing block.
MC TIP: Constantly sporting dark polishes can turn nails a yellowish hue. To lift really stubborn stains, try using teeth-whitening strips or bleaching gels on nails for 20 minutes.