The face laser was more or less disintegrating Frost Giants, and should be able to do the same thing to normal Asgardians. That alone should be able to damage and eventually destroy the Hulk buster armor. We really don't know how strong it is, but come on. Odin made that thing to defend Asgard. Sif and the Warriors three were pretty much pooping their pants after they saw that her sword did no damage. They knew they would be one shotted and obliterated. And these are relatively bulletproof individuals who can probably lift a couple of tons each.