I'm on 500mgs test and I get pretty bad acne from it too. I tried taking dutasteride to see if it would help and I do believe it has helped some. As far as SARMS S4 helping, it actually seemed to make the acne much worse for me once I started taking it about two weeks ago. I understand why Radar would think that, I believe theres some research that shows SARMS to have a bit of a DHT blocking effect?
But honestly the only thing that seems to do anything is massive amounts of Benzyl Peroxide. I have to wash with Benzyl OXY two or three times everyday, and I put on the vanishing spot cream at night. It will help you out a lot, but the acne is not going to disappear completely! The acne bacteria is an extremely well evolved creature!