The raw edges of my sleeves and the bottom hem were simply folded over and sewn down; I used two lines of stitches on the bottom hem to emulate the look of my original shirt, although the sleeves and collar on the original shirt appeared to be separate pieces of fabric that were attached. I didn't end up finishing the collar at all because I found it too difficult to work with folding over the curved edge (likely a similar issue as the one I had with the sleeves).