[R-390] Charred chassis cleaning

[Thomas Frobase]

Go to the paint store and purchase a quart of denatured alcohol and a 
quart of acetone no shop should be without them ... tom, N3LLL


On 5/7/2012 7:42 PM, John Wendler wrote:
> I pulled the audio deck off and spotted the big char mark on the main
> chassis underneath.  The mark was like something "hot" broke loose and
> partially arced and partially burned.  A mess of carbon and some resin,
> perhaps a resistor burnt.  (A previous audio deck; the present one shows no
> signs of reciprocal damage.)
>
> Formula 409 did not touch it, neither did Isopropyl Alcohol.
>
> PVC pipe cleaner, on the other hand, worked a treat.  The charred mess
> disolved like a drop of ink into a large glass of water.
>
> PVC pipe cleaner is a mixture of things like Acetone and MEK; there may be
> other organic solvents depending on brand.
>
> I would not use it near a painted surface or any plastics, but it did a
> nice job on the aluminum.
>
> Use only with good ventilation and appropriate chemical precautions.
>
> JPW
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