It's been wild of late (good things coming down the pipe), but I've managed to steal some shots of a piece I am working on these past few days. I'll also toss a few vids on my Facebook profile.
Lettering is relatively straight forward, but it can be time consuming in practice - at least for me. The time depends a lot of factors (style of the letters, size, etc...) and whether or not you can lay them down by hand without any assistance. In this particular instance, I'm battling a lot of big block letters (~ 6" tall), so I'm using contact paper. For this particular piece, I probably put in a few hours on the letters alone - may sound like a lot, but I'm very very picky when it comes to lines.