Is CO2 a good option to remove marks left by 30% TCA Cross? (photo)

Fractional CO2 laser may improve the scarring, but will not improve the pigment, and in fact may make the post-inflammatory hyper pigmentation worse.  You may be better off with topical and oral fading/lightening agents, and combine Picosecond pigment lasers (eg PicoSure) and chemical peels to minimise the pigment.  Pigment lasers may require multiple treatments and patience, so you may have to give this some time.  Best of luck, Shobhan.

Hello royasami,
It looks like you have increased pigment as a result of an inflammatory reaction in the skin from your peel. This is a common occurrence, especially with darker skin color. This condition is known as Post Inflammatory Hyper-pigmentation or PIH. It can be best prevented by an appropriate skin care program before and after laser or peel treatments. Medical grade treatment protocols are available through most cosmetic physician offices. Personally, we like the ZO pigmentation kit with hydroquinone.
 A series of 3 PRP treatments one month apart and then every 6 months following that should help your overall skin health. PRP results will not be immediate; it will help skin health over time, but only have minimal improvement on scars and pigment. 
CO2 is the very best treatment for scarring and overall skin rejuvenation. It comes with the inherent risks associated with an aggressive treatment however, one of which is PIH. I always recommend that patients create a treatment plan under the care of an experienced physician that includes a comprehensive approach to healthy skin to resolve and minimize risk and celebrate great results. Good luck!