True Earth has just added metal colours to their SDW range. Two shades are already available.

SDW Shading Metals have the same properties of SDW Shading Colours, and can be mixed with them.

The only difference is that, although they can be airbrushed, they are optimized for brush uses: painting, blending and drybrushing.

Currently there are two references for SDW Shading Metals, Light Metal and Gun Metal.