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    Re: Fluids for Bubble Sextants and Sealing Methods
    From: Robert Swartz
    Date: 2015 Dec 28, 14:37 -0800

    Bill;

    I appreciate your insights. However, I beg to differ with you on filling A-12 bubble chambers with alcohol which is hygroscopic and can cause corrosion or discoloration in the bubble chamber interior.

    Also you cannot seal w/ shellac as alcohol dissolves shellac.

    When working w/ old radium paint--better put a luminescent coating on top rather than trying to dissolve the old paint in acetone and repainting. Remember this is nasty stuff and creates disposal 

    issues.

       
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