I'm going on the assumption that you are referring to exhaust nozzles. Here's what I did for mine featured in the attached pic.
I first primed them with MM grey primer. I then sprayed Alclad Steel over everything. I then gave a quick mist coat of Pale Burnt Metal. I followed that up with quick very light mist coats of Tamiya Clear Blue and Clear Orange. I then gave the nozzles a wash of Tamiya Smoke. Flat coat was my final step. It sounds a lot more complicated than it actually is. Whole process took about half an hour.
For compressor fan faces, I'll prime first with MM grey primer, then spray either Alclad Steel or Tamiya Metallic Grey. Tamiya Smoke for the wash to bring out detail.
Hope this helps. If you have any other questions, don't hesitate to ask.