Vallejo Metallic Liquid.

Find these. Find these and buy them. They are beyond stunning. They are mind-blowingly good... I hope to have a few photos up tomorrow, but these paints make me want to play Necrons so I can paint with them...

If you're in New Zealand: Slave to Painting has the full range. They cannot ship them overseas though, because of hazardous shipping stuff. But Find Them!