Microdermabrasion is a wonderful technique in getting spectacular results for your clients in your spa. The way microdermabrasion works is by removing or exfoliating dead skin cells on the outer basal layer to allow for new cell growth. The exfoliation which stimulates the new cell growth can be done by different techniques, either mechanical or chemical. Microdermabrasion is a mechanical exfoliation technique, but there are different methodoligies. The crystal method.