I did a series of 8 weekly glycolic peels @ 30%, and have been using a 2% salycilic exfoliant (good old clean & clear) most days. Faded discoloration by about half, whatever that means, it looked significantly better but was still noticable.
I've been doing 10 minute tanning session e3d for the last 4 weeks and it seems to be evening out the colour further. Still not perfect but again an improvement.
This is almost solely post acne hyperpigmentation not full blown scar tissue or keloids. I have no clue how you deal with real scars other than making an appointment with a dermatologist of a plastic surgeon.
Do NOT mix peels and tanning and I'm a white guy that tans easily. Peels and People with dark skin (black, chinese, etc) apparently have different issues attached to them. You can screw your skin up with peels do your research and start with less aggressive peels first.