The OPI Start To Finish 3-in-1 Strengthener is a versatile lacquer designed to serve as a base coat, top coat, and nail strengthener. This multi-functional product helps to improve the wear and longevity of your manicure while providing essential care for natural nails. Use it first to create a protective barrier against staining and maximize lacquer adherence. Apply it as a top coat to seal the color, add a high-gloss finish, and resist chipping. Furthermore, incorporating it into your routine strengthens naturally weak or brittle nails over time.