The OP didn't state what they where interested in applying this on.
I've researched this quite a bit also and there is one out there that you can clear coat. It's called Spaz-Stix. It comes in a kit on EBay for around $35-40 with its base, chrome and clear, all the videos I've watched on it, state that the base MUST dry for a minimum of 24 hrs before applying the chrome. It can be buffed out before applying the clear, they make in a spray can but everyone says that airbrush is the best application. I'm gonna by a kit and use it on restoring the rallye dash. So everything I've read so far says it's best for smaller parts and interior trim pieces.
I tried Alsa Killer Chrome spray can kit on a rally inst' bezel a few years ago. I couldn't get it to lay evenly to all those contours. I suspect this is why all the example videos are of applying on a "egg shell" shape.
maybe a air brush would work better. Good luck