I tried cleaning the Aluminum for days...and it never really came clean...(or good enough so I could live with it...) It was like my Aluminum Trans casing's metal was "Stained" or something with blotchy white marks and white patches in the Aluminum metal and never polished out. I gave up and finally submitted and just painted the damn thing.. some Rustoleum Pro Series "Aluminum" if I remember correctly..
I have no regrets! Stills looks mint 15 years later.. Though not technically correct...
It was definitely one of those areas that I took some liberties..
)
Tony K.