On the armor, kind of. We have two tutorials that might help. Chief wrote a tutorial on using Green Stuff in general but focused it on sculpting on figures.
http://wiki.joecustoms.com/wiki/Customi ... reen_StuffAsphalt wrote one that focuses on how to make removable armor which may also be useful to you.
http://wiki.joecustoms.com/wiki/Sculpti ... able_ArmorI haven't seen folded wings specifically for Nemesis Enforcer. What I have seen are people who use Schliech/Papo dragon wings or Halloween bat decorations. Luckily, most places are stocking Halloween stuff right now.