Dear Patient, I often pre-treat my fractionated CO2 and Erbium patients with a regimen that includes Kojic acid, Hydroquinone cream, Retin A and also includes weekly Glycolic acid peels. I start with a very low concentration such as %10 and move up to %35. Light Glycolic (Alpha and Beta acids) can prep the skin and prevent blotchy skin and prolonged redness after the treatment. These peels should be very light and performed by an experienced Dermatologist. They are specially valuable in patients with darker skin color (Hispanic, Asian, Light toned African American patients). Please discuss this with your surgeon. I hope that this answer was helpful. Yours, Dr. David R