Aluminium Corrosion - any tips

[gerryattrick]

Although the frame isn't retro I'm sure the problem will be familiar to retro bike owners.

I've just bought this frame in 7005-T6 alloy. It has a few spots of corrosion like in this pic which I want to get rid of before painting the frame. I'm pretty certain there'll be no structural problems once I clean it off - using fine waterproof sander and wire wool - but is there any way of treating the cleaned up areas, as with Kurust for steel, before painting to stop it returning.

 

[raidan73]

I would've thought that as long as you leave doing your prep work until just before it is painted then this should prevent it oxidising?

 

[34henry3w]

Polish it out to the point you see no pits, and then use something like CLR to remove all oxidation. If the aluminum is covered by paint I would think it cant really oxidize any more as it needs air exposure..