Call Mario Russo "just" a hair stylist, and you'll risk offending him; hell, if you think all he does is snip bangs, you've offended us, too. After all, Russo owns two salons in Back Bay; he's developed his own successful product line; and, just recently, he has expanded into the medical-grade skincare realm, offering a roster of new treatments at the larger of his Salon Mario Russo (9 Newbury Street, Boston, 617.424.6676) locations. Offerings include LED Light Therapy ($95/30 minutes), to revitalize and strengthen skin; Medium Depth Skin Resurfacing ($210/two 30-minute appointments); and Precision Peels ($80 to $105/30 minutes) and Facials ($95/45 minutes) that are all geared toward your face's specific needs. Russo also offers guy-friendly Gentleman's Precision Facials ($95/45 minutes) and an Ultra Custom Anti-Aging Treatment ($350/two 45-minute appointments) based on your DNA make-up. In related news, Russo is also expanding his empire: he plans to open a salon in Stowe, Vermont this fall.