sorry, I don't really know anything about it. I know what a black dwarf is, though... it is a very dead star.
Would you try and colonize a tiny ball of iron or whatever it is? thought not.
Magnetic fields and stuff... yeah. idk, please work on this article.
stuff to get the fellow big brains working... I can't now. you do it.
Well, It's not empty anymore... that's a start.
also it would be radioactive... you guys wrought about colonizing stars and gas giants and stuff (even black holes,) so this article deserves to exist.
From someone else: mostly pointless.