You could try a chemical peel. They are usually used on the face but I think it will help your situation alot. It removes the outer layer of skin. It doesnt hurt. You should look into it.
I'm not sure this will help in your case, however foods rich in vitamins A and E along with fatty acids usually help to remove some scars overtime. These are like fish and other sea foods, yellow and orange colored foods, nuts, seeds, egg, milk, sweet potato, watercress and all green leafy vegetables.You will also need to bear in mind that there are some scars that will not go no matter what - unless of course plastic surgery is done.