This is very, VERY well done. I really dig what you did with the patterns and what not.You can't beat porcupine quills. Just use the finest bit you've got got to make the holes, during the clean up pro ess. Then paint em black when you're doing finishing details. I'm adding a lot of quills to my Hellbreed, so you'll get an idea of what they'll look like.
Or you could check out one of the hundreds of kits Joe D has used them on... :/