I was working on my radiatoron my truck with my friend at the cadillac dealership(thats where he works) and when we were done, he says "lets clean it up" so he starts spraying all kinds of different stuff on my motor. All I can say is wow, it looks brand new. He used some sort of aluminum acid cleaner on the engine(made my nose burn to breathe it) and he used something called "blue magic", it smelled like cherries, just like black magic. I guess this is all stuff the dealership uses to detail the cars. I'll take some pics tomorrow to show you how clean my engine bay is...