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How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.



 
 
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  #1  
Old January 9th 09, 07:45 AM posted to rec.sport.unicycling
wickedbob
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


Alright, I would like to polish my kh 08 trials rim to mirror finish,
along with some koxx cranks. I'm not 100% sure how, I have access to
drills and grinders, so maybe a wire brush? If so, what kind? I'd like
to know for sure before hacking my unicycling up. Also, would this work
for my kh 08 frame?

As I said, I'm wanting to polish these parts, so I don't want them to
have extremely coarse surfaces.

Thanks for the help.
I searched.


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  #2  
Old January 9th 09, 08:09 AM posted to rec.sport.unicycling
saskatchewanian
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


Anodizing is a forum of oxidizing which means that it is the aluminum on
the surface that has changed colour. It is not like taking off paint you
will need to remove a thin layer of aluminum from the surface.

I think KH frames are powder-coated though so you should be able to
strip that a little easier with the help of some paint strippers.


On anodized parts I think the best bet would to sand them down with
fine grit sandpaper then polish with a buffing wheel. Not sure the best
way to keep things shiny as aluminum will react with air and oxidize
again once you remove the protective (anodized) layer.

EDIT: I would stay away from wire brushes on the anodized parts as the
anodized layer is harder than the aluminum below it.


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  #3  
Old January 9th 09, 09:53 AM posted to rec.sport.unicycling
wickedbob
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


Thanks, I tried sanding an anodized rim before, got no where and was
three for an hour or two. I'll have to get some sort of power sander.
I've used the dermel bits and smaller things, and alu just clogs those
up and makes them worthless.

I was planning on either clear coating, or using a reflective clear
coat.

Yeah, kh's do have powdercoat, I just heard they were hard to strip, so
I figured I would ask.

Who was the guy who polished and airfoil? I should shoot him a pm.

To polish, I was also planning on using really fine 600 grit sand
paper, well prep.


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  #4  
Old January 9th 09, 10:09 AM posted to rec.sport.unicycling
rob.northcott
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


wickedbob;1167398 wrote:
Who was the guy who polished and airfoil? I should shoot him a pm.



I think it was Pete Perron (unisk8r)

Rob


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  #5  
Old January 9th 09, 11:31 AM posted to rec.sport.unicycling
onebyone
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


Take it to an electroplating business and just pay a reasonable amount
as they can do it in a short time and can take the powder coat off as
well. They polish metals before chroming, are experienced in polishing
and can do a great job on aluminium. The next step is to take it to an
anodiser and get a bright finish. I have had a KH 36 frame, an airfoil
rim and some cranks done and they look great.


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  #6  
Old January 9th 09, 11:32 AM posted to rec.sport.unicycling
Smilymarco
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


onebyone;1167424 wrote:
Take it to an electroplating business and just pay a reasonable amount
as they can do it in a short time and can take the powder coat off as
well. They polish metals before chroming, are experienced in polishing
and can do a great job on aluminium. The next step is to take it to an
anodiser and get a bright finish. I have had a KH 36 frame, an airfoil
rim and some cranks done and they look great.




Do you have any pics from that? Would like to see that. (Parts and
complete uni if possible )


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  #7  
Old January 9th 09, 11:34 AM posted to rec.sport.unicycling
onebyone
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


Not yet. I will have a few by the weekend.


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  #8  
Old January 9th 09, 11:49 AM posted to rec.sport.unicycling
wickedbob
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


Yeah I never thought of that, that would be awesome to see. About how
much did it run you to get all of that done? Are you in the us? If not,
I'll need to convert. I just want a general number.


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'Add wickedbob to your ignore list' (http://tinyurl.com/3dfrko).
Help to keep JC all Billy, all the time. Do your part, resurrect and
use his threads. BTM FTW.
My posts don't count they came from MR...would they matter anyways?
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  #9  
Old January 9th 09, 02:22 PM posted to rec.sport.unicycling
jtrops
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


I have no idea how many things I removed anodizing from back in the bmx
days. Spray oven cleaner like easy off takes the anodizing off. I
don't recall how long you leave it on, but a little trial and error
should get you there. It really was easy though. I don't even think we
had to scrub it. I think it really just wiped off.

Remember, once the anodizing is off there won't be anything to prevent
oxidation of the aluminum, so you might want to be ready with some clear
polyurethane after you polish the metal.


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  #10  
Old January 9th 09, 08:25 PM posted to rec.sport.unicycling
wickedbob
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Default How to remove anodizing (rims/cranks) / Polishing aul. to mirror finish.


Thanks for that tip! Any idea if I could damage the raw alu with that
stuff if I left it one for along time? I would just spray it over night
and let it sit. I could use my oven since it's broke, well has been for
a few years now.


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R.I.P MITCH HEDBERG
'Add wickedbob to your ignore list' (http://tinyurl.com/3dfrko).
Help to keep JC all Billy, all the time. Do your part, resurrect and
use his threads. BTM FTW.
My posts don't count they came from MR...would they matter anyways?
------------------------------------------------------------------------
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