What chemical peels are safe for those allergic to salicylic acid and darker complexions?

I would like to suggest an entirely different approach to the improvement in skin texture, the improvement of dilated pores and the evening out of irregular pigmentation. I am not surprised that there was little benefit from microdermabrasion, since this is really just a form of epidermabrasion and a similar effect can be obtained with the repeated vigorous use of a Buf-Puf or a wash cloth. A series of glycolic acid peels (6-8) at semimonthly intervals can be effective especially when performed with maximal strength (70% concentrations). I generally find lower concentrations to be much less beneficial and I would suggest that you find out what concentration was used for you, as the use of a lower concentration might be responsible for your lack of response. A series of TCA (10-15%) peels might be a suitable alternative, although care should be taken in people of color owing to some concern for the development of hypopigmentation.Fractional Medical Microneedle treatment or medical microneedling, either performed with a manual Dermaroller or an electrically driven device (Dermapen) is an excellent approach for improving overall skin texture and color and for improving fine wrinkles and superficial scars. Consultation with a board certified aesthetic core physician with extensive experience with all available modalities is your best bet for achieving gratifying improvement. 

Lactic acid and glycolic acid are both safe as long as they are performed by a certified professional.