I have been around this stuff for 20 years plus and I have never ever seen nor heard of this. And why only on his chest and back? I mean, when I see someone who gets acne from roids, it is on their face, back, shoulders, etc. I have never known anyone to get zits on their chest even from puberty. Maybe he get all infected from shaving or something, but damn, that would be the rarest case of zits from steroids I have ever seen. I am not saying it couldn't happen, just never heard of it in all the years I have known about this stuff.
Maybe George and Company could do some research and shed some light on this.