A company called Inframat was showing a series of coatings the Eurosatory show that are supposed to greatly reduce the IR signature of objects. So it could be used to hide a tank:

More accurately, it could be used to hide a second tank:

The company also makes IR suppressive fibers that can be used in uniforms and cammo netting, and claims to have an anti radar coating in development that gets you -15 dB to – 25 dB signature reduction at 8.8 – 10.5 GHz. It’s not full stealth, but it would make ECM much more effective.