[R-390] Re: Polishing

[Jim Brannigan]

I use Simple Green to clean chassis and panels.
It is applied with a broad artists brush, allowed to sit for a while and
rinsed with water.

Jim


>  From what I remember from past projects, the anti-fungal varnish usually
> appeared as a light brown (if thick enough) coating on the electronic
> components and underchassis. It appears that that is the case on this
radio
> as well, on the few Motorola modules that I have in the radio.
>  I think what I have is a thin plating (alodine, it seems) on all of the
> metal surfaces. The overall color of the metal is a very light yellow, but
> when viewed closely, a rainbow of colors can be seen - just like a metal
> plated camera lens. I've seen the same rainbow on the metal frames of 80's
> VCRs and audio equipment.
>  I'm not too worried about reapplying it; if there is a cheap and safe (no
> zinc chromate, thanks) way to reapply it, I'm all ears. Until then, I'll
> be limiting my polishing where needed; still have lots of it to do in this
> beat-up radio.
>
>  I was working on the Crystal Oscillator cover, with the black
> painted numbering and varnished labeling; both are pretty resilient to
> NEVR-DULL polishing. I had expected quite the opposite, especially on the
> varnished label. Now the cover is shiny! Yippeee.
>
>
> David P. Goncalves
>
>
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