I honestly would not get the hose out to wash the engine, even if im posative all the electrics are covered. There too much at risk.
For cleaning i used Normal Brake cleaner, and Engine cleaner from Halfrouds, and autoglyms Metal polish. But to be honest any metal polish would do.
I also used the cream colour rags you can buy from Wilkinson, and a pack of diffrent grades of metal wool.
I use the wool with brake cleaner to get off the oxidis-ation on the A/c pump(or i think it is, right next to the Alternator) and pipe work.
I will post some pics on the car care section if the work pc permits me to. lol
Monki.