The MDacne products are designed primarily to prevent and treat active acne and not scars or dark spots. Having said that, the first step for dark, post-acne spots is to control any active acne to prevent any new spots from forming. MDacne products include ingredients that will treat and prevent new acne while also helping fade dark spots over time. To help treat dark spots more quickly, you can also use the medicated dark spot remover on alternating nights with your nighttime acne treatment cream.
To treat existing scars you would need to refer to your local dermatologist to consider microneedle RF treatment or fractional lasers.