Paula'S Choice SKIN PERFECTING 2% BHA Liquid Salicylic Acid Exfoliant-Facial Exfoliant for Blackheads, Enlarged Pores, Wrinkles & Fine Lines. GENTLE NON-ABRASIVE LEAVE-ON EXFOLIANT: With 2% BHA (Beta hydroxy acid), to unclog & diminish enlarged pores, exfoliate dead skin cells, smooth wrinkles, and brighten and even out skin tone.