Part of OPI's Good Enough to Treat holiday collection, Butter Me Up Toffee pairs a warm brown base with fine gold micro-shimmer for a toffee-like finish rather than a flat neutral. It's a standard Nail Lacquer — brush-on, no UV lamp needed — applied in two thin coats and sealed with a top coat for shine.
Because the shimmer is fine rather than heavy glitter, the first coat can look slightly sheer; a second coat brings it to full, even opacity. Like the rest of OPI's Nail Lacquer line, the formula excludes formaldehyde, toluene, xylene, dibutyl phthalate, camphor, and several other ingredients, and isn't tested on animals.