The 4-way nail buffer has 4 steps to achieve the natural looking shine. Even Out (Dark Green): Place buffer along nail edge at an angle and using gentle strokes in one direction only, file the nail onto the preferred shape. Smooth and even out edges of the nail. Smooth Nail (Light Green): Use easy strokes across the nail in one direction only, to smooth deeper ridges and remove stains. Very deep ridges may require more than one buffing treatment. Repeat every 2-3 weeks. Buff Nail (Yellow): Buff nail surface to eliminate fine ridges and stains. Use easy strokes across the nail in one direction only, for a smooth matte finish before final shining. Repeat every 1-2 weeks. Shine Nail (Beige): Apply light pressure while stroking across the nail to bring out an amazing natural shine. The more often you repeat this step, the shinier your nails will look.