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    Re: Scope mounting on vernier sextant?
    From: Bill B
    Date: 2013 Dec 14, 02:33 -0500

    On 12/13/2013 9:20 PM, Bill Morris wrote:
    > To clean the scales, Noell, use household ammonia diluted 50% with water
    > and rub it on gently with a finger tip, refreshing the finger
    > frequently. It will also get your finger tip clean!.. Rinse off the
    > ammonia with fresh water afterwards. Above all, avoid the use of
    > abrasives and metal polishes as these will eventually destroy the very
    > fine graduations.
    
    What of the old cigar? ashes on a fingertip as a very mild-abrasive
    polish? In my world the ridges on the finger tips (fingerprints) are
    mild abrasives on their own, complete with an oil lubricant. Asians
    shaped jade with bamboo, clearly softer than the jade, but an exercise
    in patience; unlike a belt sander, where one can make the problem they
    set out to remedy worse in seconds :-)
    
    Personally I would avoid (harsh) chemicals, and try a light finger rub
    with whiting or rotten stone (if you have a traditional woodworking
    friend). Or Tripoli or toothpaste.
    

       
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