On Fri, 28 Jan 2005 21:05:17 -0500, Chuck Harris
wrote:

David J Windisch wrote:
Hi, all concerned:

I suppose this stuff is oxidation from loooooonnng storage.

How do I remove it without taking the lettering off, pls? Vacuum?
snip---
Old steel chassis boxes are frequently zinc or cadmium plated. When the
plating gets damp, it oxidizes. If it is zinc plated, you get a white
powder that is zinc oxide. If it is cadmium plated you get a yellow powder
which is cadmium oxide.

If you scrub, you will make a chassis that looks scrubbed. What I sometimes
do is blast the majority of the dust off with compressed air, and a gentle
dusting with a paint brush..

-Chuck
Chuck,
Any idea what plating Heathkit used on the HW-single-banders? I have
one that has gone directly to the Iron oxide stage.