Get striking nail art in seconds with nails inc. Piccadilly Nail Polish a mesmerising special effects polish. Use the magnet within the lid to create a rich dazzling gold fishnet design. nails inc Piccadilly Nail Polish has been specially developed with metallic particles to create a pattern on the nail using magnetic forces. As the magnet is held over the nail the iron powder in the formulation gravitates toward the magnet forming the pattern secretly hidden in the magnet for an astonishing finish! Itâs never been easier to get professional looking nail art at home.