Nail Lacquer OPI Nail Lacquer is the number one salon brand worldwide. When used in a professional service, color can last up to 7 days. A professional service consists of proper natural nail prep, base coat, color coat and top coat application. 3-STEP SYSTEM NATURAL NAIL BASE COAT 22001008000 NT T10 Helps prevent staining of natural nails and promotes a long-lasting manicure. OPI TOP COAT 22001009000 NT T30 Helps prevent smudges while drying to a smooth, high-gloss, protective shine. BASE / TOP COATS ACRYLIC NAIL BASE COAT 22001739000 NT T20 Helps prevent staining of acrylic nails and promotes a long-lasting manicure. OPI MATTE TOP COAT 22002218000 NT T35 Transforms glossy colors to a satiny finish.