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