I think you are correct. Thanks for making me look the insulation up.
Insulative paint - Wikipedia, the free encyclopedia
It turns out it's a paint additive. Some advantage over conventional insulations, but it wouldn't stand alone. It was declassified by NASA in 1996 so that covers the aerospace, now all I need are some speed holes.
I visited a container dealer today. It turns out aluminum boxes still have steel edges and corners with flat aluminum panels and T-ribs instead of corrugations. They come in used and heavily used, with a 2x price differential. He'd never seen anyone add a hitch and wheelboxes instead of using a trailer.