To fix the smudge, dab the pad of your index finger in non-acetone remover (be careful not to get any on your nail!). "Lightly sweep it over the dent to smooth it out," says N.Y.C. manicurist Jin Soon Choi. Cover with a light layer of polish, and finish with a quick-dry top coat. Or try an at-home gel formula. Some gels need an LED or UV light to dry, but this Nutra Nail kit has you alternate coats of "activator" and color for a polish that sets in less than five minutes and lasts about as long as a traditional manicure.
Nutra Nail Gel Perfect UV-Free Gel-Color in Flame, $12; at drugstores.Read MoreLess