How to improve scarring from acidic burn? (Photo)

3 or 4 years ago I sought out some help from my dermatologist with regards to some mild icepick scars I had on my cheeks. He recommended an acid treatment that he promised would flatten out the deep scars. The scars are now much flatter as he said, but also much wider and seem to have lost pigmentation to some extent. After doing some research it appears that this loss of pigmentation is notoriously difficult to treat, but I was hoping that someone out there might have some advice for me.

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