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    Yes. At least, that is what I used to do.

    Yes. At least, that is what I used to do.
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    I used that for several years. It was my own...

    I used that for several years. It was my own invention but I did not consider myself to be the first to come up with it. My ratio was lower, at about 0.5% mineral oil in lab grade isopropanol. ...
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