Re: breaking out on back and chest
Salac by Medicis works great on body acne. I have been using it for many many years. I rarely find it over the counter, but you can ask your pharmacy to order it for you...no prescription required. It is around $11 for 6 oz. VERY WORTH THE MONEY.
You want the wash, not the foam. And in the shower, use it as a wash with a bath scrub brush. I think you will be pleasantly surprised.