What is Microdermabrasion (Diamond)? Skin Treatment : Facial and Body Microdermabrasion is a skin-freshening technique that helps repair facial skin that takes a beating from the sun and the effects of aging. The beauty therapist uses a device like a fine line sandblaster to spray tiny crystals across the face, mixing gentle abrasion with suction to remove the dead, outer layer of skin. More than one treatment maybe needed to reduce or remove fine wrinkles and unwanted pigmentation.