i've been using retin a for quite some time now and prior have used tazarac for years. i would like to try the following peel and wanted to know if i can use the retin a at night and this in the morning or should i stop the retin a for a few days prior? Blend 25% (Glycolic + T.L.C. (T) Tartaric, (L) Lactic, (C) Citric Acids) and Salicylic Acid (BHA) 2%: