Once again, not a lot to say. I'll just take you through the different renders.
Took a fairly long time to make. To put the time in perspective, I managed to watch both series' of 'Spaced' whilst following the tutorial. So, yeah, a fairly long time.
This is the fan with no smooth modifier, lit only by a spotlight.
This shows the fan with the smooth modifier applied, lit only by a spotlight.
This shows the fan with the smooth modifier and an ambient light in addition to the spotlight.
This is the above render with the ambient light made slightly brighter.
This shows the fan with the reflectivity reduced on the fan blades and centre cap, with the same light settings as above.