| I'd disassemble the knobs,  take the case apart, then clean the parts 
with Simple Green and paper towels / Q tips.  Simple Green seems to be 
easy on paint and other surfaces, watch out for the harsher cleaners, 
they can do damage.  A good ol' radio, used to be my mainstay.
Clark
WA3JPG
On Apr 8, 2008, at 5:13 AM, Bill Ames wrote:
>
>
> I have a 509 which has been sitting unused for many years and has 
> gotten a
> layer of dirt, sort of like aged dust. It is otherwise like new, just 
> needs
> to be cleaned. Can anyone suggest the best method to do so?
>
>
>
> Bill
>
> KB1LG
>
>
>
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>
>
Clark Savage Turner, J.D., Ph.D.
Professor of Computer Science
Cal Poly State University
San Luis Obispo, CA. 93407
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