Oatmeal and sugar to whiten skin? Who would have ever thought! All you need is a handful of oatmeal and about three tablespoons of sugar. Mix with some lemon juice until a coarse scrub-like texture is formed. But, do make sure that the paste does not turn too smooth or runny. You may use this paste to scrub your face and neck while showering and then wash off like usual. Do this twice in a week.