Exfoliate
1) To peal off scaly skin spontaneously.
The skin exfoliates from the palms and soles in Kawasaki's disease and Reiter's syndrome.
2) To deliberately wear away the top layer of skin, as many be done gently by a facial technologist who is applying a topical skin treatment for cosmetic purposes, or more severely by a dermatologist treating acne.
In the latter case, the most common exfoliating methods are sanding and chemical peels