Blender Cycles learning curve

Using Voronoi noise to make a "fridge texture" combined with a two tone hard shiny surface with uv mapped decals using the alpha as a mix.  Trying to figure out a way to soften the bump map a touch.  It's a bit harsh right now.  Node based shaders get out of control quickly...
 This is for a medical robot.  A dangerously insane medical robot.  Naturally.

It's all in service of a new film.   Here's a rough work in progress of some of the effects shots.  I'm trying to do as much as possible in the computer rather than using practical effects.