I would have to say yes, you can use Sustanon for cutting provided that you use it with something similar to Deca, such as EQ. I'm just talking from experience and I know I'm gonna take heat for posting this, but in the past when I took Sustanon and Deca, I packed on lean, very mature looking muscles that were ripped, hard, and had really nice striations. But to keep water retention to a minimum, I watched my diet closely, and I did cardio at least 4 times a week.
Everyone reacts differently to AS, and for me to react like this to an AS that is known to cause water retention is really weird. I've been using cutting drugs, such as EQ, Winstrol, and most recently Finaject, for the past 3 months, and I can honestly say that I'm not as ripped as I was when I was on the Sustanon and Deca, go figure.
But that's just me, take it for what it's worth, like I said, everyone is different.
SAF