For those who would like to have fun, interestingly designed nails, this video shows how to paint smiley face nails. After applying a base coat, mix a plain matte bright yellow and a plain matte white nail polish together on a piece of paper. This will create a lighter shade of yellow. Apply the lighter yellow mixture to the nails. After applying two coats and allowing them to dry, use a black nail polish to draw the eyes and mouth of the smiley face. This will give you a cute and stylish design on your nails.