Old scars are already remodeled and very difficult to treat. Once you have a scar you can only try to make it appear better, nothing will remove it fully. With that said there are many options such as non-ablative fractional resurfacing (Fraxel DUAL), ablative fractional (Erbium, Co2) and fractional radiofrequency (such as Ematrix). I suggest seeking the cosmetic consultation of a cosmetic dermatologist who specializes in laser treatments. A last option is always surgery to revise the scar, but often leaves scars like this worse. I would not suggest that as an option and would shy away from a doctor who recommended it. I wish you the best of luck, Dr. Emer.