As you can see from this picture, we removed the engine cover grates, and there was a lot of polishing compound left behind from previous detailers.

We believe that it's very important to not only polish the paint you can see, but also the paint that you don't normally see.  I use a small polisher to get even the door jambs polished, including the carbon fiber trim.  This gives the car a much cleaner and crisper look.