Interesting technique, but I still think the wireframe material and Push-modified duplicate is the best way to go - it doesn't require altering your model's geometry, and I'm pretty sure it'll render faster. Also, it's easier to tweak the colour and wire width/opacity that way.
cournichon pour vous psych0 ! Nice method man , i always like to know alternative ways to do something even if it requires more work , but i have to agree with the push modifier , you get more control with it and a wireframe material where you can customize it all . But nothing beats screengrab HARR ! Nice tip about the…