Nails must be clean and free of nail enamel, oil and cream. Brush HARD AS NAILS onto nail surface, just like nail color. Brush around nail edges and under the nail tips. Apply 1-2 coats, letting each coat dry thoroughly before applying the next coat. HARD AS NAILS can be worn alone or as a base coat under your favorite nail enamel. Apply HARD AS NAILS over nail color as a shiny top coat to seal and protect your manicure.