Use chemical exfoliation, its a lot better and a lot less irritating than manual exfoliators. An example would be an AHA, like glycolic acid. Or maybe kojic acid.

How they work is they increase cell turnover, therefore your skin sheds a lot faster, getting rid of the pigmented skin and bringing up new, uncolored skin.

What product do you specifically recommend? Do you have a link or brand etc? Thanns