It's simply blue lead! Suggestion from Sak. It's great to work with! Really smooth and somehow it eyes more gentle than the common grey, which can scream "FAILURE" at you, whereas the blue is more like "Hmmm... You tried, but it doesn't look the way you wanted it to be... Try again!"
Remember Malaysia? Where we had to wade through tons of scooters in order to get anywhere? And that I at some point grinned insanely and wouldn't tell you why? That was way. It was supposed to be part of your birthday gift batch, but I never got round to finishing it.