What's the best way of adding a zip to a suit jacket as I'm going to be cosplaying as "Reno" from Final Fantasy VII in October at the MCM Expo and after being told off by a couple of the members here for not having a zip on my suit jacket even though I was cosplaying as a OC Turks member, I've decided I don't want to take any chances and get told off again...
As for the zipper, putting it on a jacket won't be much different from putting it on anything else. Position it, pin it, sew it. Your edges will already be hemmed and you won't want a topstitch, so you'll probably just want to hand-sew it to the lining.
Workin' on: ULTROS [Final Fantasy VI] (30%) Haydee Tebelin (manga) [Gankutsuou] (10%)