Chemical peelings with kojic acid, glycolic acid, and trichloroacetic acid, either alone or in combination, are effective therapy for diffuse melasma and localised hyperpigmentations (lentigo).

Dermatol Surg 1999 Jun; 25(6):450-4
The use of chemical peelings in the treatment of different cutaneous hyperpigmentations. Click here to access the PubMed abstract of this article.