Courtesy of a good bro on MT:
I got quite a bad little outbreak of acne from the Winstrol (winny) I am running, I used the following regime to stamp it out quickly.
Hot bath, wash face and body with Cidal natural antibacterial soap with grapefruit extract. (available from boots for a £1 a bar).
After bath apply a pea sized amount of 100% pure aloe vera gel. Stuff that is green comes in a big bottle, can be found with the sun tan lotion.
2.5 grams of holland and Barret timed release pantothenic acid. Split dose.
Sunbed for 12 mins twice a week.
Hot shower in evening, wash face and body with Cidal antibacterial soap.
Before bed, clean face with cotton pads and surgical spirit. I made sure to really soak any bad spot patches.
The above routine has worked really well, if you feel you are drying out too much you could add an extra aloe vera session before bed.
However, bare in mind this is only going to help, its not going to cure androgen induced acne, this comes from the inside (sebaceous Gland) not from anything on the skin.