DragonGalvy
Sr Member
it may not work on moving items like shoes, but years ago when I built my model kit of the Enterprise-E, it was possible to buy a transparent coloured spraypaint which coated the inside of the nacelles (which in the model kit were completely clear) - then when lit from inside with a white light source, they glowed red and blue respectively (i.e. the light came evenly through the paint). I think the paint came from Toyworld, a store which also sold some model kits (not sure of the equivalent in America, though)