Meteoric is one of those prefixes in DF/DFRPG that causes me a lot of headaches. I've never yet had anyone get a piece of meteoric gear without also coming in with a question about how it works. Here are all of the posts I can find on the subject for my game:
What good is Meteoric Armor?
Rules & Rulings from 1/3/21: Meteoric, Knife & Swashbucklers, and Silvering Meteoric
Another ruling from 1/4/21
Meteoric in my DF game
DF Felltower Gear: Meteoric Iron Bullets
And if you want to ensure a complete "seal" against a floor-based magical attack, you'll need plate armor footwear to ensure nothing gets through. That's a "new" ruling but I don't think it's inconsistent with anything I've posted, or with a sense of what magic-dead armor could actually do vs. magic that reacts to physical contact with the floor.
Meteoric costs a lot, and does a very narrow of things very well . . . and that's that. It's not terribly convenient to use in a magic-using party but it has its moments.