OPI Nail Polish is brilliant, it's chip-resistant and the professional formula is available in loads of fashion-forward nail colours, OPI Nail Lacquer is "the colour that keeps on giving". For a longer lasting finish, try our range of OPI Infinite Shine 2 nail polishes, which comes in some gorgeous shades. How to Use Step 1. Start by applying OPI Base Coat to clean, dry nails with cuticles pushed back. Step 2. For a perfect polish, apply one stroke of nail lacquer down the centre of the nail, followed by one stroke along each side of the nail. Step 3. Then apply a second coat of nail lacquer, pulling colour over the tips of the nails. Step 4. Shine, seal, and protect with one coat of OPI Top Coat, pulling it over the tips of the nails.