Nail Polish. Nail polish is a great way to enhance the look of your nails with colour, texture and design. Whether helping to keep your hands look well-groomed or to complement your outfit for an event, nail polish is a great addition to your cosmetics collection. Sweet candy pink nail polish. 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 center of the nail, followed by one stroke along each side of the nail.