Hi all, I just purchased a 2010 kx450f from a police auction. Unfotunately the bike had been stored out in the weather after it was siezed and it still had mud all over it. As you could well understand this has stained all of the alloy frame and engine casing. I have scrubbed alot of the frame with reasonable success, however, there is still brown staining in some areas. the motor itself is next to impossible to do without removing the engine and I am looking for a less physical way to do it. What would be the best way to removed the stains and buildup, are there any chemicals that would give me a better result and would be less labor intensive? Cheers Brad