Why Doesn't Glycolic/Lactic Acid Peel Work on my Skin?

Your skin needs to be assessed by a skin-care professional before administering any form of peel. The skin needs to be prepared accordingly and correct home-care needs to be used in order to achieve the maximum benefits of having a treatment. I would also suggest you look into peels more suited to oily and congested skins such as Jessner and Salicylic peels, that target oil production and flow in the skin. I would highly advise against administering these peels at home and would strongly recommend that a dermal clinician perform them in-clinic. Acne and scarring respond well when treated using a multi-faceted approach of in-clinic treatments and home-care. 

The skin need to be preped before you get the maximum effect of the peels.
The skin need to be degreased before applying the acid.
Be careful doing your own peel, Plus the fact that glycolic acd is not a treatment for acne scars. see a professional