Jose carlos Valle josecvalle at gmail.com
Mon Jan 19 16:54:57 CST 2009

My God... its is so bad... try kerosene with oil  or vinegar.
I have here in my Museum, in some condition, 026, 029 and 032 IBM ..
And no volunteers to clean up that stuffs.
May be some in Computer history museum in Mountain View help you. There is a
technician there  with 89 years old and he
is good in IBM stuffs, I saw there a 1401 work until today.
See Yah
Jose Carlos
take a look the photo I did last august there.

2009/1/19 Pete Turnbull <pete at dunnington.plus.com>

> On 19/01/2009 04:23, Mike Loewen wrote:
>>   I'm in the process of rejuvenating an IBM model 29 keypunch, and a
>> couple of areas have some sort of oxidation on them.  The card drum is the
>> worst:
>> http://sturgeon.css.psu.edu/~mloewen/CardDrum.jpg<http://sturgeon.css.psu.edu/%7Emloewen/CardDrum.jpg>
>>   The steel parts are fine, but the rest has a white material over most of
>> it.  I'm not sure what sort of metal it is, looks a bit dark for aluminum
>> but the white material looks similar to aluminum oxidation. What's a good
>> approach to cleaning it up?
> It looks to me like Mazak, which is a zinc-aluminium (and sometimes some
> magnesium and copper) alloy used for die-casting.  You could try steel wool
> or a wire brush but I would bet it's badly pitted and probably needs
> machined.
> --
> Pete                                            Peter Turnbull
>                                                Network Manager
>                                                University of York

José Carlos Valle - Presidente
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