Preserving boxes with Metalex in New Zealand

Hi there - I am new to bee keeping :slight_smile: , and new to this forum. I have one Flow Hive and one regular box hive that I have just put together. I am preserving the new box with metalex per my bee profs instructions, and wondering if the flow hive needs to be preserved as well. It is made of Araucaria wood. The folks at Flow don’t know - hoping there is a kiwi beekeeper who might…

thanks in advance :slight_smile: