i also noticed that when i stopped trying to "treat" my acne, it went away for the most part -- at least i don't feel the need to wear mineral powder every time i go out in public anymore.
it seems like the more i treated it, the worse it got, and it was actually laziness that led to my discovery that it was better to leave well-enough alone!!
i was even using the "natural" acne stuff, like tea-tree oil based and all. turns out i'm allergic to tea tree oil.
now i treat the occasional pimple with a drop of lavender oil -- same basic healing properties as tea tree but much milder (and better smelling!). and i only wash my face in the shower, and with mild soap or sensitive skin face wash. i moisturize with a completely non-greasy gel facial moisturizer (it's mary kay something - a gift from my SIL) after showers, and that's it, except in winter, when i need more than just that (i'm eczema-prone).