aluminium does not rust but it can pit and stain

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2001 BMW 540I/6 M-Sport
2002 BMW X5 4.4I Sport
2000 SL500 Triple Black, Xenon(SOLD)
1997 SL500 Triple Black(SOLD)
2000 Nissan Xterra(K&N FIPK)(SOLD)
1997 Jeep Grand Cherokee(K&N FIPK, MSD-6A, 60,000volt Race Coil, 10mm wires)(SOLD)
1994 Jeep Gran Cherokee (MSD-6A, 60,000volt Race Coil, 10mm wires)(SOLD)
1990 Mustang LX 5.0 (375hp)(SOLD)
1982 Volkswagon Rabbit Covertable(SOLD)