Ligaya H. Buchbinder, MD

A combination of Vivace Deep Radiofrequency microneedling and dermal fillers will greatly improve this condition. Vivace treatment has to be repeated at least three times. One month apart.

Deep microneedling with the Vivace Radiofrequency device gives pretty good results in this situation but personally I would  treat this with PDO nonsurgical facelift and it will give immediate results lasting for about a year.

For light scars in an early stage I would recommend eMatrix Sublative for a resurfacing. eLos is a broad band light / intense pulsed light photo-facial that targets sun damage and some vascular concerns. Both the eLos and eMatrix will stimulate collagen production for minor tightening of the loose skin. A series of these treatment combined will give the best result. 

From what you're describing I wouldn't think anything as invasive as CO2 would be needed. 

You may also consider Vivace RF Fractional Microneedling or a Picoway Resolve treatment for tightening and scars without pigmentation. 

Chemical peels come in many different strengths, without knowing the percentage of salicylic acid and how it was buffered and neutralized its hard to say how deep the peel will be. Its very important not to further irritate the skin by using any harsh chemicals or exfoliants. Use a chemical free sun block made for post procedure, I recommend Elta MD. Its also imperative that you keep the skin moistened, a vaporized water such as Avene is helpful and a gentle moisturizer is recommended. 

Do not pick or peel the skin, it must heal from the deepest layer first to avoid scaring or pigmentation discoloration.