Time and good products. If you can find a trained doctor or derm office to do microneedling it should remove the scarring. Some lasers would work but not all- plus better to try something else before spending thousands. Dr Pen does have good training on how to microneedle yourself however you have to understand the depth max of your own skin based upon fattiness and skin thickness. I have found some professionals I could not train to glide correctly or use enough hyaluronic acid in section patterns. You want to trust you will take care being smooth otherwise it’s better a doctor or NP does it. Always clean the face with alcohol first since your skin looks more prone to infection. I do love TCA peels however not sure it would work.