I can't find any specs on the High Power,however, I know from past that the beads are embedded in a special emulsion that clings to vinyl and is washable. I think it's more than just beads, you have to have an suitable emulsion to evenly spread the beads across the screen surface. I'm guessing this emulsion would have to be transparent to avoid uneven light reflection and over a white vinyl surface for uniform color characteristics.
I encourage trying to to duplicate yourself, but get ready for lots of frustration. Mica angular reflective craft paints (and aluminum in some cases) mixed in white/grey wall paint and Minwax Polycrilic as described on this board are proven choices and work very well--without the need to experiment.