Frosting after chemical peel. Recommendation? (Photo)

Frosting indicates epidermolysis which is the splitting of the epidermis from the dermis resulting in peeling and crusting of the skin during and after the peel. Its very rare but not uncommon for this to occur during superficial peels . Skin priming with mild strength retinoids is advised atleast 2 weeks before a  peel to minimize side effects .A mild steroid cream can be used after consulting with your doctor if the discomfort persists .Post inflammatory hyperpigmentation  can ensue after a peel if the crusting is severe so reapply sunscreen every 3 hours for maximum protection. For acne scars deep peels containing ferulic acid and retinol is recommended 

You need to have help from a board certified dermatologist with an actual interesting in taking care of acne.  They are out there.  Because you are scaring from acne, you need an active program with your dermatologist to manage the acne and also you have to avoid damaging your face from picking.