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 Post subject: Re: polishing techniques
PostPosted: Sat Sep 28, 2013 10:56 pm 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
Yes, i saw them recently somewhere. I will have a loo about and get back to you.

Also, is the 12000 commercially available?

Richard


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 Post subject: Re: polishing techniques
PostPosted: Sat Sep 28, 2013 10:58 pm 
Dirt Disciple

Joined: Mon Sep 23, 2013 9:09 pm
Posts: 54
I have no idea, I shall ask him. he just had a roll that he 'borrowed' I thought it only fair to use!

really? that would be great, thought I would have had to have started another thread!
cheers


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 Post subject: Re: polishing techniques
PostPosted: Sat Sep 28, 2013 11:01 pm 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
look up!

Richard


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 Post subject: Re: polishing techniques
PostPosted: Sat Sep 28, 2013 11:05 pm 
Dirt Disciple

Joined: Mon Sep 23, 2013 9:09 pm
Posts: 54
http://www.suttontools.co.uk/polishing/ ... omesh.html

look up?


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 Post subject: Re: polishing techniques
PostPosted: Sat Sep 28, 2013 11:15 pm 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
Argh!!!!! I had posted but it did not post!!

Have a look at this -

http://www.sjscycles.co.uk/alloy-brake- ... prod31081/

hard to see if it is the right bit - give them a ring and check. This is not what i saw this week but it might be close. If i can remember the other site i will get back to you.

Thanks for the link,

rICHARD

p.s. typed this twice now!! LOL


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 Post subject: Re: polishing techniques
PostPosted: Sun Sep 29, 2013 1:09 am 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 18207
Location: Sunny Glasgow
Attachment:
Suntour V-GTluxe rear mech 001 (Medium).JPG
Suntour V-GTluxe rear mech 001 (Medium).JPG [ 75.72 KiB | Viewed 93 times ]
I have some black ones if your stuck. Mine might be Bakelite though :lol:

Probably plastic :?

I havent taken this to anywhere near 12000 grit :lol: but im happy the heavy scraping has been removed from the edge and across the logo. The knuckles came up quite well also.
Must say i prefer polishing cranks :lol: rear mechs have lots of tricky places.
On that note one of my next clean ups is a nice early Suntour V-GTluxe. Dear lordy, seen the amount of parts that make one up :shock:


Edit: Suntour pic added


Attachments:
Shimano FD-A105 Golden Arrow Rear mech 004 (Medium).JPG
Shimano FD-A105 Golden Arrow Rear mech 004 (Medium).JPG [ 86.23 KiB | Viewed 93 times ]
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 Post subject: Re: polishing techniques
PostPosted: Sun Sep 29, 2013 4:16 am 
Dirt Disciple

Joined: Mon Sep 23, 2013 9:09 pm
Posts: 54
would the bakelite ones fit ok? what's the correct term for them so I can have a search?
cheers


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 Post subject: Re: polishing techniques
PostPosted: Sun Sep 29, 2013 7:36 am 
Retro Guru
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Joined: Sun Mar 17, 2013 10:25 pm
Posts: 1262
This is a bit more heavy duty than small bicycle parts but here is an alloy wheel I polished last year

Wheel as purchased
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I removed the powder coating using 400 grade sandpaper on an air powered DA sander, then using 400 grade wet & dry I cleaned up the bare wheel face, then 1200 grade wet & dry to give a finer finish and eventually finishing with 2000 grade wet & dry.

I start to polish up the wheel using Solvol Autosol and the results were encouraging although not as good as I needed, so I spent another hour with the 2000 grade wet & dry to get a really smooth finish.


Click images for full size

This is the tiny marks that had be sanded out
Image

The aim is to have a uniform even finish
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Once prepared it took a maximum of 10 minutes to polish the wheel using the rotary and 10 minutes to finish by hand
Image

The finished results are rather good considering
Image

Image

Image

Image

Image

Image

Image


The alloy used in wheel making is not completely smooth, so a complete mirror finish would be almost impossible, plus if it was a mirror finish the lacquer would not adhere to it properly, so I am happy with my efforts. Just need to get it to the paint shop now for the painter to do his bit.


Next was to have my local car body repair shop etch prime, clear lacquer and over dry the wheel to protect it from the elements


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 Post subject: Re: polishing techniques
PostPosted: Sun Sep 29, 2013 8:16 am 
Dirt Disciple

Joined: Mon Sep 23, 2013 9:09 pm
Posts: 54
nice work! what did you use power tool wise to bring it up? need to do quite a bit more and the fingers are already worn!


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 Post subject: Re: polishing techniques
PostPosted: Sun Sep 29, 2013 8:29 am 
Retro Guru
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Joined: Sun Mar 17, 2013 10:25 pm
Posts: 1262
I have a 3 phase compressor that puts out 24CFM of air so I can run virtually any tool I require. For these wheels I used a DA sander to remove the hard powdercoat layer and most of the blemishes. I used an electric rotary polisher to buff up with Autosol and the rest was done by hand.

The problem with alloy wheels is the alloy is extremely tough, much tougher then bicycle parts and the wet & dry wears out long before the blemishes are removed so you need a plentiful supply of W&D and change for a fresh piece every few minutes


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