Black and White 3Ds

I would like to render the 3Ds just in black and white. A lot of the times I am just using them as spacial refrences because the finishes I'm using can't be loaded in the 3D planner. I have to put a disclaimer on the 3Ds before we review them to let them know the random blue fabric on a seat or the color of a table are not the actual colors being used. I've tired to change the color of furniture using the color editor but it never seems to work.