19 Jan
2009
19 Jan
'09
5:08 a.m.
On 18 Jan 2009 at 23:23, Mike Loewen wrote:
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?
I seem to recall that the drums on 02x keypunches were brownish
(probably an anodized coating) and silver-metallic if you scratched
them or they wore through. I suspect that the drum is a magnesium-
aluminum die casting.
I'd try mechanical buffing either with a powered cotton buff and
white rouge or a polish such as 3M 39529. Or try something from the
local auto supply store for polishing alloy wheel rims. If you want
to reproduce the original coating, Caswell Plating has small
anodizing kits.
My thoughts, anyway...
Cheers,
Chuck