@Builder,
Since you're so knowledgable, then you are well aware of the large amounts of steel in the world trade center, all coated with anti-corrosive paint.
I see no comparison done, along with your precious paper, ruling out the most obvious. It should be easy to find a sample, the dust must be full of particles.
I also didn't see any supporting evidence as to the reactions of actual thermite to the tests they performed, where is their baseline?
The other thing I can't find, is any actual peer-reviews of this paper posted on an open pee-reviewed web site. But maybe you know where they sre.