Technical & Reference Section > Tech and Restoration

Anodised Crank Arms, Blue Doesn't Match. Darken, lighten or remove?

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Wayne Ryder:
Expertise needed, gents.
Some years ago I bought an Odyssey Black Widow crank. When it arrived the arms were odd lengths (175 and 180 I think), which came as news to the seller who'd used them for ages and not noticed. He kindly offered a return, but it seemed very possible that sooner or later I'd find a donor arm. Every so often I'd check our favourite auction site, but nothing for bloody ages.
When one appeared last week, I pounced on it.

Well, it arrived and it's tip-top. S'just I'm not sure about the colour. My original pair is a darker blue, the 'new' arm is much lighter.
So, is there a way of fading the darker arm? Would it be better to wait several more years and get them both redone? Would that even work, since they're not bare to start with?
Or is it a case of strip & polish, or possibly paint?

oldtired:
 i assume there are anodized,  its easy to take the color off if they are  ,i don't think silver black widows were polished so it'll easy just to clean em after the color is gone , this will be the simplest and quickest option

you can fade the anno with a mild caustic solutuion but its very hit and miss and the parts have to be very clean before you start to avoid a patchy finish ,parts i've faded look as if they are old and been used , the anno tends to dissolve quicker on the coners of parts,

the only way to ensure a good color match is to have them re anodized , 

BMX1973:

Is all the arm coloured? Would anyone notice as on opposite sides? If you can live with it at least you can keep the original finish.  :)

deeman:

--- Quote from: BMX1973 on December 11, 2015, 08:52 PM ---
Is all the arm coloured? Would anyone notice as on opposite sides? If you can live with it at least you can keep the original finish.  :)

--- End quote ---

^^this.....as they on opposite sides is it really that noticeable?

MartyC:
The anodising fades in sunlight/uv so try placing the darker one on a window sill that gets a lot of sunlight for a few weeks  :daumenhoch:

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