Painted Upper Intake Manifold
This took me about an hour to completely mask off the 3400SFI lettering on the intake manifold.  I then put about 6 coats of high temp engine spray enamel on the manifold.  I think this gives the engine compartment that "Personalized Touch."  The paint I used was Dupli-Color's High Temp Engine Enamel #DE1605.
Another way to paint the intake is to pick up a paint pen and paint the intake with that.