Laser and Micro-Dermabrasion really work on dark skin? (for stretch marks)?

lilmiss asked: I have ugly stretch marks on my breast since I hit puberty (10 yrs ago)..I went to cosmetic clinic today and they stated that they can treat my problem..the thing is that….well, its freaking expensive! lol I want to know has anyone tried it on old stretch marks and does it really work? […]