Dark spots like ingrown hair on buttocks. What treatment can I get? (photos)

Hello, I have had these embarrassing black spots from ingrown hair (I think) all my life. Until a year ago, I used to get one or two pimples. once I began to gently scrub my butt every other day, it stopped. Now I am left with a dark bottom with scars and such black spots. I using amlactin. I find difference in smoothness, but appearance is largely unchanged. Now am considering laser treatment or some chemical peel? Please recommend the likely course of treatment to remove these spots?

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