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I had briefly met Sherry Coggins (sp?) and her husband recently at the Bullitt Nationals in Myrtle Beach, SC. They had won the "Best Engine Compartment" award for 2001 Bullitts. The aluminum components in their 2001 Bullitt's engine compartment were ridiculously terrific...so I asked them what they used...409 and a stiff nylon brush! Anyway, I gave it a whirl and man does it work...the yellow tint on the aluminum brightened right up. In the pics below, I did not clean the alternator for comparison purposes. The Coggins recommended to clean while the aluminum is at room temperature. Good stuff, Coggins! Anyway, I thought I would pass this information along.
Update note: Purists be advised...I cleaned the alternator today [22AUG08] and the small green factory "x" that is marked on the top of the 2001 Bullitt alternator will be erased by the 409 cleaner. I guess you could clean around it but you could also make another green "x" via grease pencil or marker. Also, the factory sticker that is purple/white/black on the alternator held up quite well to the 409 cleaner and appears unaltered.

Update note: Purists be advised...I cleaned the alternator today [22AUG08] and the small green factory "x" that is marked on the top of the 2001 Bullitt alternator will be erased by the 409 cleaner. I guess you could clean around it but you could also make another green "x" via grease pencil or marker. Also, the factory sticker that is purple/white/black on the alternator held up quite well to the 409 cleaner and appears unaltered.

