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    Re: Instrument Engraved Marking Restoration - Help
    From: W F Jones
    Date: 2010 Mar 02, 13:49 -0500

    Thanks for sharing your experience with the group. I don't have a bottle
    of the acryllic poster paint but my wife informs me it is common enough
    and easy to get.  I plan to begin my search a little later this PM for
    some.  Another suggestion posted uses waterproof India ink and I may
    have a bottle but it doesn't explicitly label it as waterproof.  I have
    a laundry marker pen and a Sharpie to also try.  I vaguely recall
    someone telling me years ago that engraved lettering/marks on metal were
    often filled with jeweler's rouge and sometime sealed with a clear coat
    of something.  I have a few ounces of rouge but the pale green color
    rules it out since black is needed.
    
    I have constructed some simple test strips (water resistant paper) which
    will be soaked in a water bath for a minute (ummm, maybe a NY minute) to
    see what happens.  The test strips will first dry for at least 24 hours
    before immersion.
    
    Frank J.
    Rochester, NJ
    
    On 3/2/2010 1:07 AM, Bill Morris wrote:
    > Frank,
    >
    > When restoring micrometer sextant scales, I scrape out the old paint
    > with a scriber under magnification of about x 7 to aid my aging eyes. I
    > then fill in the graduations with acryllic poster paint and almost
    > immediately wipe it off again with a barely-damp cloth. For small areas,
    > just licking the cloth is enough. The poster paint is very quick-drying
    > and it takes very little practice to find out what "almost immediately"
    > means for a particular paint. If you get it wrong and the paint doesn't
    > wipe off the face of the instrument, simply use a wetter cloth and wipe
    > harder. Once dry, it is reasonably waterproof.
    >
    > Bill Morris
    > Pukenui
    > New Zealand
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