want white nails? use this at home recipe: Pour 2 ½ tbsp. of baking soda into a small bowl. Add 1 tbsp. of 3-percent hydrogen peroxide. Allow mix to sit on nails for 3-5 minutes. Alternatively, you can soak your fingers in the solution for 3 minutes instead of applying it. If you do not have hydrogen peroxide or baking soda available, try soaking your fingernails in lemon juice. Lemon juice has whitening properties that can also offer good results.