I know it's been a while since somebody's posted in this thread, but I went to my local Bass Pro Shops and bought one of the Birchwood Casey Super Black touch-up pens in gloss black (for the chamfered edge). It was $10, which is twice as much as online, but I don't like waiting
.
I don't know if I'm using too much of the paint or not. I put a few drops onto a piece of paper, dabbed a toothpick into it a little bit, and started covering up some scuffs on the edge of my iPhone 5. One can
easily tell that I used the paint on the edge, so I'm wondering if I used too much or not... I guess I could clean it off and try again, but I'm not positive about this method.