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PostPosted: Tue Apr 08, 2014 5:05 am 
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Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7925
Location: San Francisco, CA
Nice video on polishing Al from major corrosion to mirror smooth:
wire brush - sand blaster - 200 - wet 400 - wet 1000 - polish
YouTube

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PostPosted: Wed Apr 09, 2014 5:09 pm 
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At my university, I can get some 2500 wet grit, it is so so nice to use, also 1 micron diamond polish gives the best mirror finish I know of. Source, I'm a materials science student and have to polish samples to make them suitable for microscopy :) haven't tried any old bike parts yet but I bet the microstructures would look pretty cool in some parts :)


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Posted: Wed Apr 09, 2014 5:09 pm 


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PostPosted: Wed Apr 09, 2014 6:05 pm 
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Location: San Francisco, CA
Awesome! Then you can do TEM on your crank arms, and impress everyone here (not sure how good sample prep is for the crank arms, though...)

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PostPosted: Wed Apr 09, 2014 9:47 pm 
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Haha, that would be wicked, although SEM of some carbon parts would be wicked... might have to look into this!


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