...any time you paint over highly polished chrome (without roughing it first), there is an increased chance you'll run into adhesion issues.
You don't want to rough the stuff like chrome legs and socks, because then it will be less shiny (even clear coated).

If chrome is already starting to fail (pitting and corrosion, flaking in places), I have no problem roughing, priming, and painting it.
I don't paint over chrome lugs or socks, because I'm afraid it will eventually start to fail in spots. I mask those, then polish and wax after the paint job is done.