Here you go Chris,
http://www.machinerycleanery.com/index.htmOtherwise, elbow grease, elbow grease, stainless steel wire brushes, tooth brushes including 'pointy' ones, parrafin, Auto Glym motor cycle cleaner and all finished off with a good dose of ACF50 or Scottoiler anti corrosion fluid after every wash. Paint, lacquer and plastic coating all fall off or go fury, or the corrosion lifts them off.
There are no easy short cuts and you have to be persistent. Alternative is to run a 'window box' special, which once the oxidised layer has formed just requires the oily rag treatment, vaseline, ACF50, Scottoiler fluid or WD40 sprayover after every wash. Not shiny but a lot cheaper and easier!
The final method practiced by many in the TC is called 'minimal maintanence' or neglect! This can lead to grief if you are in a hurry or use your transport on the 'just in time' principal when it decides to break and you can't remove the fasteners! ;-)
Regards, Bill