I believe that only happened once, in that horribly written story with Dr. Polaris. Considering that the bracers are 1.) magical, 2.) break every other scientific law, and 3) were, according to lore, forged from the skin of a goat, I don't think they should be susceptible to magnetism. I remember asking Gail Simone about this once on one of the forums and she agreed.
As I said though, I think the Polaris incident is the only time it was attempted and he was shocking her with electric currents through the bracers. (And of course, that definitely shouldn't work.)
The bracers have been magnetically manipulated before Polaris. She also has a low tolerance against electrical attacks. Magneto wins since she can't break his shields before he knocks her out.
Plus wasn't Polaris amped by the entire South Pole and tooling several other Leaguers?
Other than that I've seen several showings putting Polaris out of Magneto's league like fighting Alan Scott and Jamie Reyes etc..He's just not as well known
The only person that comes out of that Polaris showing looking at all respectable is Polaris himself. It's a horrible, horrible scene that stinks of bad writing.
I agree, Polaris usually ends up looking good at the expense of other characters, like making Martian look like a dumb ass by manipulating the iron in his blood, even though he can turn his blood and insides into Rocky Road if he wanted to.
And was it stated that she has a low tolerance for electricity? If not, then the point stands. We've seen her knocked out before. That doesn't mean she has a low blunt damage durability. We've seen her handle Zeus' lightning bolt and not have the bracers effected by electricity. She eventually got the Zeus' lightning upgrade too. The Polaris incident is not consistent with the character.
And if this is DCNU Diana, considering who her daddy is, it really seems unlikely that shocking her is the way to defeat her. And didn't we just have a scene w/ Batman explaining that she doesn't have a weakness?
Getting nearly KOED by a single blast from Black Lightning? Um, yes. One showing doesn't contradicts many others. Getting lightning upgrade doesn't mean much, its like saying superman can shrug off hv.
It is.