Liquid Reflector is a reflective paint – available in five colors and a clear version, and, according to the manufacturer, yields a fine surface and high reflectivity. (Note: the reflected light is white, regardless of the visible color on the surface). We’d like to test some of this – see how it holds up – and whether its reflectivity would be affected by polyurethane or other transparent protective sealants.
The elegance of reflective materials, of course, is that they’re not dependent on electricity, and, wherever placed, they work when/as needed.