1.Mix sugar with honey and use it as a scrub twice a week. This is a wonderful natural polisher.
2.Cut a lemon in half, and scrub your knees with it. Leave lime juice overnight on your dark elbows and knees and see the difference for yourself.
3.Make a paste of milk cream, a pinch of turmeric, and 3 drops of basil leaf extract. Rub this mixture on dark elbows and knees and keep it overnight for maximum affect.