This is a unique lipstick intended to deepen and alter the color of a lighter lipstick. I don't use it often, but find it useful to beef up light lipstick that doesn't suit me that I would ordinarily return. It's a good lipstick to have in your collection for this reason.
Gunmetal Luminizer is designed to go over lipstick to give it depth and richness of color and shine. It can also be used as a sheer grey eyegloss, as it's not especially sticky - this is what I had wanted the earlier limited edition Tom Ford for EL Amber Nude collection eyegloss in black amber to be. Much easier to apply in the "lipstick" form now.