A method that works for many, in a week or so, is to coat the acne with a thin layer of a dandruff shampoo that has the active ingredient, pyrithione zinc (read the labels) and let is set for a few minutes. If it starts to feel warm, time is up, because this ingredient will attack anything that lives, including your skin, with enough exposure. The trick is to leave it on, long enough to basically reset the entire microbial population of your skin, but remove it before it goes deeper.
After the wait, shower the shampoo off, very thoroughly, with only light rubbing. You don't want to form a lather, or you will remove your skin oils. You want those oils, that now have a tiny bit of pyrithione zinc diffused into them, left behind to discourage bacterial growth for a couple days.
Repeat this process no more often than every second day.
The best part about this treatment (after being available, cheap and easy to use on large areas) is that, if it is going to work, for you, you will see improvement in about a week. (two or three treatments). If you see no improvement in two weeks, you might as well try something else.
I am sort of keeping track of what the success rate is for this method, so it you try it, I would be interested in hearing about your experience, whether good or not. Thanks.