[Bricklayer]

There is a product made by a company called Bio-Kleen that is used mostly on snowmobiles for cleaning and restoring bare aluminum, it's called Aluma-Kleen and it works great at removing oxidation and cleaning bare aluminum and it won't hurt painted surfaces. I have been using it since 2003 as i got tired of the WD40 and ScotchBrite grind! Spray it on and wait between 15-45 seconds and rinse off, you won't believe the difference. If it streaks spray on again and rinse immediately. My Hi-Tech is painted but my engine and trunk, wheel wells etc. are all aluminum. Make sure you spell it as above because there is another company called Bioclean that makes laundry and house cleaning supplies!