Try exfoliating and using Vitamins A & C.
Using a mild exfoliant regularly will remove scarred skin cells. Look for these exfoliating ingredients: rice extract, salicylic acid, and lactic acid. They help skin cells turnover more quickly, bringing new skin to the surface.
Exfoliating and brightening skin care products fade old red or brown spots. Vitamin C (ascorbic acid) and Vitamin A (retinol) increase cell turnover and will lessen acne scarring. Use these products once daily for several weeks. Learn more here: https://masterpieceskinrestoration.com/blog/acne-scar-treatment/