That's ok!! Thank you!!gonna say no for a few reasons
most metals arent safe for birds, only stainless steel and nickel plated are considered safe.
the paint can chip and be ingested, and it might not be bird safe
though they would be awesome to hang toys, they just generally aren't safe sorry
if you can find an unpainted stainless steel one, then it might be ok as long as you can guarantee all parts of it are stainless.
if he likes playing with it like that, why not try a drinking straw bent into a loop and hanging it on the cage like that?