Powder coat it, or get it off then powdercoat? If you can get it off, then how?
That's it really.
Ta.
Can powdercoat over it, if the powdercoater blasts it first - not to get the chrome off, just to try to get a key on it. I don't think it bonds as well as it does to raw steel, though.
Getting it off completely is a horrible process, which also attacks the underlying steel. I've seen several frame failures caused by rechroming - the underlying steel ends up tissue thin.
See if you can find someone to media-blast it, using walnut shell; far less abrasive, so no danger of risking the integrity of whatever the subject is, but gives a nice Matt, frosted finish that paint can key to.
I saw a rusty car shell done like that, an old Mustang, and it looked like a brand-new pressing. Apart from the rust holes, that is...