2. The composition of nail polish is different from that of nail polish glue. nail polish will oxidize and turn yellow in the air, and the pigment will also precipitate in the nail, which usually needs to be removed after 3-4 days. Nail polish is an epoxy resin with no toxicity. It needs to be irradiated by a professional nail polish lamp before it can solidify quickly. It can last for 20 to 30 days. If the nail polish lamp is not illuminated, the nail polish oil is hard to dry.