The only topical treatment to even slightly faze the dreaded body acne is copious amounts of isopropyl alcohol. Even then, it's a battle that's hard to win. Oral antibiotics have also been known to do the trick; ask your dermatologist.
Isolaz, an in-office dermatological treatment, zaps and prevents acne. You have to do three to four treatments over six months, and it's not cheap ($500 each time), but it really does work. The new at-home device from Tria Beauty (pictured) functions in a similar way.