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I am painting my shaped white plastic LGB turnout indicators. The indicators have a light bulb that shines through the plastic to provide visual direction indication. I want to paint the indicators RED & GREEN to illustrate the turnout's direction from a distance. All the inks/paints I've tested seem to quickly wash out in the California sun. Anyone have recommendations for RED and Green paints/inks that will not wash out and yet translucent enough for the light to shine through the color from the light bulb?
Mark
What about permanent marker? Not sure what your turnout indicators look like but 3d printing might be an option. I messed around with that for some RC plane indicator lights once. https://www.thingiverse.com/thing:3446588
