Step 4: The tip: free hand
Using color A, swipe from one side of your nail to the other in a continuous stroke, covering just the tip of the nail. Repeat for each nail and let dry completely.
Dip a small brush into nail polish remover, and slowly, using a circular motion, take away the paint on the inside of the nail, leaving your "smile line". Make sure this line curves slightly and is not to think to avoid making your fingers look stubby.
Allow to dry.