yeah Ive tried Brasso, autosol, Duraglit...
They look ok if I scrub them with Brillo pads, in hot soapy water. My fingers are actually clean after that...well cleaner..
But my bike bits are old and corroded and damaged.
So I file off the casting marks and the dents.
then sand that flat...and the corroded bits
Then in the soapy water to wet and dry and brillo pad them.
But Im a man so cant with stand the allure of power tools.
Got a new Bench Grinder from B and Q so gonna get polishing mops for it.
Got loads of stuff to polish.