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Author Message   Rick_oleson Tinkerer Username: Rick_oleson Post Number: 1304 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Tuesday, May 14, 2013 - 05:29 pm:    I'd probably try going in the front first. Negative elements are thin at the center and very thick at the edge - the big beveled edge has to be painted black to control flare in the lens. Even if the paint has not come off, if you see light-colored areas in the paint when looking at it through the glass, you should scrape the loose paint off and repaint it (I just use black Testors model paint). Air bubbles between the paint and the glass will defeat its anti-reflection purpose.