Scars on the legs

People who complain of scars on the legs frequently are referring to dark brown spots rather than scarring.  Chemical peel exfoliation of the skin can help to lighten skin of the legs but in people of color, peels that are too aggressive can actually darken the skin.  If brown spots is what you are referring to, things that can help include tretinoin cream (retin-A), hydroquinone, azelaic acid, and mild cortisone creams for short-term use.  I suggest you consult with a board certified specialist first to obtain an accurate diagnosis.