It's a technique I use a lot when making colour schemes for me Dalek models.  I can save out bits like eye lenses, retina glow, neck mesh, lamp glass and anything else that's common to all models.  After that, I use a simple "Apply to all" command to change body colour, then apply the mc6 for all the other bits and bobs.  I also have several different ones for the hemis so I can mix and match as I go.

A real time saver and sometimes it's worth saving just a single material as a mc6, simply because you know it's going to apply correctly every time.  

Coppula eam se non posit acceptera jocularum.

My Store

My Gallery