hi doctor, is lomela cream useful in clearing tan from hands? can the same be used to clear acnescars from my back? i have a leucoderma patch on my back.(it was caused when i tried to take a sebaceous cist with a blackhead remover and using solutions like hydrogen peroxide and toner).is melanocyl solution+uv radiation helpful? how long does it take lomela to clear tan and acne scars? how long does it take the leucoderma patch to clear?