[R-390] Rat Track Solvent?

[Paul Anderson]

Scott,

Keep in mind that the acids in animal excrement will tend to change
the surface of the metals and perhaps other materials (plastics).  I
would expect anodized, plated, or bare aluminum or steel surfaces to
be marred by the extended presence of such things.  I had a bunch of
automotive parts ruined by urea from animal urine (the parts were
badly stored, but it was made worse by the acids) - radios would be no
different.

Paul

On Mon, Dec 22, 2008 at 3:22 AM, Scott <scott at becklawfirm.com> wrote:
> Hello All----
>
> A while back, I remember conciderable disscussion on various cleaning
> materials for various problems and places in the 390. I'm not doing a 390
> just now (three to go) but the solution to my present problem might be
> useful in sombody's 390 restoration.
>
> Recently, I said OK to a request to fix a repeater that suddenly quit after
> years of trouble free service. I found a critical wire chewed in two and
> several more "almosts". The fixes were easy but a problem remains in the
> cleanup.
>
> Rat trash and droppings (OK to read as a common four letter word) swept and
> vacuumed out of the rack easily but the brown "tracking" residue remaining
> on the base surfaces and apparent rat trails is resistant to everything I
> have tried----water, dish and laundry detergents straight and with water,
> 409, alcohol, "Goo-off" and paint thinner. The crud releases from vinyl wire
> with a lot of scrubbing using one of the detergents and water but nothing I
> have tried lifts the crud at all from a painted, bare, galvanized or plated
> metal surface.
>
> What works?---any and all practical suggestions will be tried and their
> performance reported and I apologize for stretching the 390 boundry a bit.
>
> Thanks much--
>
> Scott, N6NXI
>
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