How to shine up old anodized aluminum?

[robot.hebobo]

Polish a anodised finish?

I’d like to hear the theory behind how that would work.

I know you're being sarcastic but... from what I can tell, 90% of the anodized finish (yes, I know it's a microns thick layer of deliberately created aluminum oxide) is intact, but there are blotches of darker, rougher (?) surface, where I assume further corrosion has happened. Lightly abrading the surface seems to even out the appearance pretty well.

I will try scotchbrite next.

 

[d8mok]

I know you're being sarcastic but... from what I can tell, 90% of the anodized finish (yes, I know it's a microns thick layer of deliberately created aluminum oxide) is intact, but there are blotches of darker, rougher (?) surface, where I assume further corrosion has happened. Lightly abrading the surface seems to even out the appearance pretty well.

I will try scotchbrite next.

Corrosion on top of an anodised finish?

 

[baron von greenback]

Does it look like rain splashes were the anodise just looks darker but looks like a water splash( sounds mad but you know what i mean when you look at it ) but theres no corrosion or damage

 

[robot.hebobo]

Corrosion on top of an anodised finish?

What's your guess then?

 

[robot.hebobo]

Does it look like rain splashes were the anodise just looks darker but looks like a water splash( sounds mad but you know what i mean when you look at it ) but theres no corrosion or damage

Yes, pretty much.

 

[baron von greenback]

I got the same thing on a set of scott matheures hydrostop brakes thought something had been spilt on them i was going to try cleaning products starting hot soapy water and work my way up is there anything under it when you sanded it may be i was wrong but thats was my thought rather than corrosion or rust because mine have no chips scratches so cant see how anything got in

 

[baron von greenback]

Also i was looking at anodising polish them who make autosol have one its in a tube and metallique thats a liquid if i right

 

[d8mok]

What's your guess then?

Without inspecting or seeing them it’s hard to say.

But purely by the nature of anodised alloy it cant be either option you’ve said.

Are they clear anodised over a polished or bare base? If so , remove the ano , and polish and get reanodised.