I know a couple of guys who've done it and been happy with it, it looks pretty good. As for durablity, I've gotten mixed reportrs, some say it lasts well and some say that it doesn't. I am willing to bet that the guts who don't have a problem had it done by someone else, and the guys that don't like it did it themself.
The one comment they make is to get a real air compressor for the air brush, not the cheapo one from Duracoat.
Another good finsish that I've heard good things about is Norells.