Mermaid scales nail pattern! You Will Need: A clear basecoat, a clear topcoat, a sparkly glitter color like blue, green, purple, gold, or pink, toothpicks, and black nail polish. 1. Base coat. 2. Paint the nails with the sparkly glitter color you choose. 3. Use a toothpick and the black nail polish to make the pattern. 4. Topcoat.