Every guitar should be shielded!
Is there ANY reason not to shield a guitar?
It takes me 2 or 3 hours of work to shield a guitar with copper foil, but if you have the paint on hand, that takes what? 15 minutes a day,,,
It is arguable just how much shielding does for hum and noise, but why not just play it safe?
And the cool thing with shielding is, you do it once and you never have to think about it again.