For the Rims etc stay away from Acid or Alkalyne based cleaners as they are not kind to the Alloy (having said that, that's what I just used on my Sporty wheels as they are bare alloy and covered in 6 years of 'stuff' + I am polishing them with S100 etc after they are clean)
I use a good wheel or car detail decontamination product such as Scholl Concepts RIM or CarPro Iron-X (both from Waxit.com.au based in Melbourne near the airport)
I had a good thread here on semi-pro process for clean and polish located here: Search for "My polishing Tips" and that should pull up the extensive thread on cleaning.
Shit! You’re meant to clean then? Bugger.. I better do it this weekend
I like S100 engine brightener for the engine etc - works well.
JFE, where you getting the S100 engine brightener from , I cant find it here in Oz.
I got my S100 from Harley Heaven in Melbourne