AMMO by MIG Streaking Effects - Solvent Based Paint for Modelling
Color: Dark Streaking Grime

From the Manufacturer:

Darkest color in our range specifically suited for streaking effects over dark colored vehicles and surfaces. Also suitable for other effects such as add chromatic richness to any piece or surface. Apply lines from the upper part of plate and then fade with a clean brush moist with Enamel Thinner.