All "chrome" paint sucks. It is a joke. All of it, every brand. It will forever be rubbing off onto whatever touches it. Even if it actually seems "dry". Strip it and do something different.
Cosmichrome is the best I've seen but it sure as hell aint in a spray can. Gotta be somebody in Vegas with a Cosmichrome system. Of course ya have to pay for that. Doc seems to like the DIY approach.