If you don't need it for something, then yes. I would rather everything of theirs be gone - just in case.

[And also perhaps because Hope's holding an understandable grudge.]

I could not say for sure. Technology isn't something that we have a great deal of experience with, though I suppose that should be obvious by now. It may be an alloy they created themselves.

As to how it got burnt, it could have been either of those things. We can fight in a variety of ways, if necessary. As can they. I am afraid I didn't participate in the fighting myself, so I can't be sure.