Change the texture/color of a face in a render

I have a section cut (the cut feature is in the assembly) and I want to apply a texture to just the cut face, to make it look like machined metal. But when I try to apply a texture to the cut feature although it looks like SW has no problem with it the face doesn't change in the render. It didn't make a difference if I changed a face color in the part model instead, in case that matters.

I am using SW2011SP4.0 and the final render quality is set at maximum.

I have seen renders with this done (at least with the section faces colored differently) so I know that it is possible, I just can't figure out. Any suggesions?

Thanks,
Dan

SolidworksPhotoview 360