Microdermabrasion will not conistently reduce or eliminate sun spots due to their deeper location in thie dermis. Topical creams or lotions containing retin A and/or hydroquinone are more likely to provide a better non-surgical solution
Micro controlled peeling gently removes epidermal cells to treat a vast range of skin imperfections. It is especially effective for skin aging. Having these treatment in a series and combining with lighetening products like Hydroquinon or a milder form of a skin lightener such as Kojck Acid, Bearberry and peels can certainly give you a better chance of impacting brown spots from sun exposure and other enviormental pigment problems.