I have been trying to get all the carbon off of my extra supercharger for a while now, always getting frustrated. I have gone through brake clean, carb cleaner, paint thinner, oil and grease remover (worked pretty good, thanks voytec). I ran out of the grease and oil remover (pre-clean to any painters), so I was trying some random stuff I had laying around. Westley's Bleach-wite whitewall cleaner and a green scotchbrite works GREAT. My whole blower and rotors are clean as a whistle in under an hour. Just thought I would pass on the info in case anyone is gonna tackle this cleaning project in the future.