When I am trying new techniques I’m very attentive to nail health and sanitation. I have not seen a nail pencil that is safe to be used under an enhancement for marking. White nail pencils are made, but they are used under the free edge to brighten it. Under an enhancement those, or any white pencil, may contain waxes, bacteria, or other chemicals that could cause lifting or bacterial problems.
You could try a nail product that is safe to use under enhancements as a mark for your smile lines, such as gel or resin. — Sarah Brown is a state-licensed instructor at Masterworks Salon and Spa (Mequon, Wis.).