Brown spots Anti-Ageing: Paula's Choice Skin Perfecting 8% AHA Gel Exfoliant Ultra-light gel exfoliant fades brown spots and smooths fine lines and wrinkles. Get your glow on. This ultra-light gel exfoliant gently dissolves built-up layers of dead skin to reveal a smoother, brighter, more radiant complexion. Formulated with 8% AHA (glycolic acid), it helps to fade signs of sun damage and corrects uneven skin tone while improving the appearance of wrinkles.