Thanks fellas! I've just finished some WIP painting of this piece. I'm really NOT satisfied of the result in flash, but in photos it looks better (that's why i still use this technique, but really, in flash it's just crappy).

Clearly, the squared nails are still missing, i've to paint them in metal, and than ink the edges.

I definitely have to find another way to paint it, because i don't want to paint a whole building with this technique.