I have done a couple of sweatshirts made into jackets. I cut them apart, taking off the cuffs (I make sure I buy a size larger and with ample sleeve length) and cut it up the center. I lay it on backing and machine quilt all over it. (I have a long arm, but my friend did the same on a DSM). After its quilted, I trim the backing and sew it back together. I used a binding like a quilt binding. I have people ask me where I got my jackets and are floored when tell them it started life as a sweatshirt. One I had with sleeves too short, I added fabric on the end and folded it up. It looks like a cuff, but only I know that the sweatshirt sleeve is not under the cuff! Its extra fabric!