All right, II finally found a way to make a solid version of this tool that I've been using since 2012. You can get similar items at Johann or Michaels, but these are more solid and they are the exact colors I use in my tubes I'll come up with a few tutorials eventually on my Youtube channel and in my private learning group, but for the moment, scroll down for the demo links.
These are simple holographic sheets. You need a flashlight to use them to do light-painting. Put your camera on a tripod and set it to blub mode. Using a remote trigger, start the exposition, wave the light around your subject and then end the exposition.
