If you're going to be taking serious pictures (we're talking engagement photos or your hottest profile pic ever), invest in a high-definition foundation. They were originally developed for actresses and news anchors on HD TVto hide literally everything.
How to get white toenails: Mix a small amount of baking soda and hydrogen peroxide together. Make into a paste. Get a tooth brush and scrub the paste onto your toenails. Then soak your toenails in the paste. Let them sit for 5-10 min. Then rinse off toes.