YES it works on regular polish too!
Does this work on regular polish?  YEP.  Not as perfect as over gel, and you really have to know how your topcoat feels at what stages of drying you're at, but it's possible.  It looks better in person than the photograph, which is taken with a flash (which magnifies quite a lot especially when all these small particles are everywhere).  Photo was taken with the powder on top of nude nail polish which is giving me a pink-toned holographic glow.  It's a bit of work to get it over regular polish and it isn't as even & perfect but it's workable.
Rating: 5 stars