[Collins] 75S panel overlay repair

[Dr. Gerald N. Johnson]

WD-40 has not been a consistent product over time. Probably most of the 
changes have been in the propellant, but soem versions make good engine 
starter (propane for propellant vs freon or carbon dioxide). As a 
penetrating oil there are many brands that make it look like water 
(though its original purpose was to remove water from aircraft engine 
ignition systems, Water Displacer formula number 40). I've not found it 
to be a persistent lubricant either, for me its more like a very 
temporary lubricant and so I'd not expect it to work for a long time as 
a knob or panel polish. Kroil is very good at penetrating, and according 
to Home Shop Machinist a couple years ago a 50/50 mix of ATF and acetone 
works better on rusty iron and steel than any commercial product 
including Kroil. Its hard to contain because of the acetone that eats 
most plastics. And that can also make it hard on paints that aren't 
baked epoxy.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.+

On 9/30/2014 5:08 PM, David Knepper wrote:
> The best applied polish/sealer is Magnolia Glayzit, available from
> Antique Electronic Supply.
> Works great on bakelite knobs which it was originally made for.
>
> Laugh or not, did you ever try WD-40
>
>
> David Knepper - W3CRA/W3ST
> Collins Radio Association
> www.collinsradio.us (new)
> Join the CRA today
>
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