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 Post subject: Re: Removing anodising.
PostPosted: Fri Feb 22, 2013 1:02 am 
retrobike rider
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Joined: Tue Jul 10, 2012 11:58 pm
Posts: 2362
Location: Bournemouth
less removed by doing it with the J cloth. Only 2 hours each arm. Did it over a few days, when watching TV when it's dark


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 Post subject: Re: Removing anodising.
PostPosted: Fri Feb 22, 2013 2:17 am 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
Montello,

I am interested in this too. If you go ahead and try it, would you mind taking a few pics - before and after and few during.

Thanks,

Richard

p.s. are you going to share what this is for? Or have i missed a post somewhere!


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 Post subject: Re: Removing anodising.
PostPosted: Fri Feb 22, 2013 2:26 am 
Dirt Disciple
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Joined: Mon Feb 18, 2013 7:54 pm
Posts: 61
Location: Lisbon, Portugal
NeilM wrote:
Caustic soda will remove anodising, but you must do the work outside and wear some gloves and glasses.

The alloy may go black in places as the anodising comes off, but it will polish off easily.


I use caustic soda with (very) hot water. Around 2 minutes for a crankset, less for smaler parts. Rinse with fresh water and a sponge. Sand if needed , polish with polishing soap and it´s like chrome. A 30 minute job. 8)

Attachment:
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 Post subject: Re: Removing anodising.
PostPosted: Fri Feb 22, 2013 3:17 am 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
Very nice job indeed.


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 Post subject: Re: Removing anodising.
PostPosted: Fri Feb 22, 2013 3:56 am 
Dirt Disciple
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Joined: Mon Feb 18, 2013 7:54 pm
Posts: 61
Location: Lisbon, Portugal
And i forgot to say... be very carefull!! Outside because of the nasty gases and thick industrial gloves and eye protection. And keep fresh water around.
Caustic soda and hot water is like Alien blood, it will eat your flesh before you know it.


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 Post subject: Re: Removing anodising.
PostPosted: Fri Feb 22, 2013 7:58 am 
retrobike rider
retrobike rider
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Joined: Sun Feb 19, 2012 10:08 am
Posts: 6852
Location: Nth Somerset, UK
Mr.E wrote:
And i forgot to say... be very carefull!! Outside because of the nasty gases and thick industrial gloves and eye protection. And keep fresh water around.
Caustic soda and hot water is like Alien blood, it will eat your flesh before you know it.



And it has the advantage of being recyclable too, as you can 'do the drains' just like my mum used to when I was a kid.


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 Post subject: Re: Removing anodising.
PostPosted: Fri Feb 22, 2013 10:14 am 
PoTM Winner
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Joined: Tue Sep 25, 2012 7:21 pm
Posts: 1156
I'm assuming the active ingredient in the oven pride is caustic soda.


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