I have decided to wash the Engine in the Mini, and have ordered Meguiars Engine Clean and Dressing Kit.

I have a 2000 Rover Mini 1.3 MPi, and was wondering what precautions I need to take when washing the engine, like covering up the alternator etc...
Picture of the engine :

Steps I will be taking so far :
1. Cover the Alternator, Coil Pack and cover the end of the air intake
2. Lightly mist the engine with water
3. Apply the engine cleaner
4. Wash clean after 5 mins
5. Uncover all components
6. Cover the motor in engine dressing
7. Clean off after 5 minutes.
Anything I'm missing?
Thanks,
Benjamin.