Hello, would be glad to answer your query. For the black spots and uneven tone which you have told, chemical peeling definitely works. It helps in getting the skin rejuvenated. But you should carefully follow the instructions as given by your doctor, during and after the sessions. But for the old scars, if they are atrophic deep scars, then may be after these sessions or combined with them few other minor procedures like needling or dermabrasion might be required. However it depends on the type of skin you have and the type of scars. Go ahead with the treatment suggested by your skin specialist.