[Hallicrafters] cleaning SX-100 front panel

[GARDGORE at aol.com]

>I first tried plain old dish washing soap and a small scrub brush and
>some of it came off.  But some of the darker residue remains and wasn't
>phased by the dish washing soap.


For the really tough jobs absolutely nothing cleans like a 50-50 mix of 
ammonia and 409. I keep some mixed in a plastic sprayer bottle. This is a very 
aggressive solution and you must be careful how it is used. This is not 
recommended for most simple cleaning jobs but rather when nothing else is strong enough. 
Try it on an inconspicuous area first to test surface or finish reaction. I 
usually rinse the surface with water first to minimize applying full strength 
and rinse the cleaned part really well afterwards. Have you ever attempted to 
clean a very dirty crackle paint finish with ordinary detergents and afterwards 
it still looked half dirty? You won't have that problem with this stuff. 
Repeat ... this method is not recommended for everything, only those jobs where 
nothing else worked and it needs to be clean. Don't get it on any lettering or 
silk-screen work and don't get it anywhere near the dials or dial glass that 
has dial scales.

Regards, Greg


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