Huh..... My search for your pine, also landed me on Ibanez... where they use Treated New Zealand Pine. Nothing there as far as 'treatment'...
Then sequitur search provided some information
https://www.nztif.co.nz/buying-nz-timber/
Not sure what the treament is, but I could imagine a dry wood being resin/epoxy filled...
There are some of these types available. But I did find the 'durability' mentioned:
"Sawn New Zealand timber dries easily and can be kiln dried rapidly from green. The wood can be readily treated with preservative to achieve all desired durability levels."
I tend to think this 'preservative' is more of resistance to moisture, insects, fungus and such.
I'll be interested to see what others find.
(Note: Southern USA has a very dense Yellow Pine, which is much different than any of our Local (PNW USA) pine.