Sensitive skin Enlarged pores Blackheads Anti-Ageing: Paula's Choice Resist Anti-Aging 2% BHA Exfoliant Ultra-light exfoliant improves visible signs of ageing and refines pores for radiant skin. Targets visible signs of ageing. This ultra-light exfoliant improves visible signs of ageing and refines pores for radiant, youthful-looking skin. Formulated with 2% BHA (salicylic acid), this leave-on treatment smooths the skin's surface while an advanced antioxidant and peptide blend defends against environmental stressors.