I'm not so sure what I was thinking with the orange. I normally don't use orange... ever.
Since I have a limited stash of fabric (by limited, I mean that I have grey fabric, white fabric, and canvas) I used the white and Sharpie'd the lines on, which ended up a lot cleaner than normal. I started by painting the back but my shaky hands made the lines look like a heart monitor.
I heard that the Undersized Urbanite is gearing up for another round this fall! Be sure to check that out, there's no kit involved, and if you're a beginner in miniatures, there's a separate section for first-timers.