Outstanding Contributor , Bob's Your Uncle!
83 280 SL- 5 speed-The PIG
Brought to mind my old aviation paint shop days where we would deoxidize / desmutt / alodine aluminum parts prior to painting.Trying to clean the transmission case on my '83 380. Nothing I do gets it clean.
It's cleaner than it was when I started but far from the nice shinny new looking aluminum I'm after.
I ordered an aluminum buffing/polishing kit. We'll see if that helps but I might be forced to paint it silver.
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However we also used Nevr Dull on aluminum that wasn't painted.
You need a bucket of elbow grease.