\Actually, I couldn't resist christening 'em "notanks!".
Groan... more "pun-ishment" from RJ. I'm sure we're stuck with... I mean he'll be here indefintiely folks.
Rob's next build a kit project could be the invisible tank. All he'd have to do is roll an old GI JOE tank over some sand, and then just take a picture of the treads.
Aiya! Puns...well, 'tis a tankless task and no mistake.

Hmmm, I did once sculpt a cloaked Klingon cruiser and a dematerialised TARDIS. Someone actually paid for the former. Then there was the New Clear Submarine I blueprinted.
No GI JOE tank but I do have a seriously sweet Tiger tank with working metal treads...
I always liked the idea of Tony clumping along wearing invisible (as opposed to stealthed) armour sounding exceptionally unstealthy in his socks...
I'm very impressed with the notank of course, but am mindful that pretty effective camouflage has, after all, been around for centuries in a military and hunting context. Some of the miracles of misdirection carried out in World Wars One and Two, for example, were exceptional even by today's standards, and harnessed the talents of professional artists and stage magicians.
I'd be more surprised if they developed a working man-packed 'cloak' (well, an unconventional non- Disruptive Pattern Material one) for an infantryman first rather than something big like a ship, plane or ground vehicle. The latter can mount and move all sorts of gear while the Mark One Straightleg has a theoretical carrying capacity....unless they've got a handy Stark International powered exoframe.
The mind boggles at the thought of a Quartermaster asking a Sarn't-Major to sign a chit to accept delivery of an invisible tank.