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?

The ps is in a gpc RV3 case and powers it and a gpc TR3.

I intend on getting them into goc as well, and then trading up to a
TR4CW/RV4 for a modest glowbug station.

TIA & 73,
Dave, N3HE
Cincinnati OH

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