Use what the military uses.
Rubberized smoke, it's shredded rubber lit on fire, burning rubber and plastic give off heated particles with the smoke that block lasers and thermal devices.
Sounds like a good modern day battlefield smoke grenade. Sure wouldn't want the wind to change direction around it though.
I was thinking more along the lines of opfor having to withdraw the asset, blinding it to the point that it's crippled on the field to allow it to be taken/destroyed, or not readily deployed in the first place..
I've shot that stuff on porous (and/or painted) material that I hadn't intended it to touch before, and it requires attention to remove.
I'm thinking "low tech" will play a role in combating "high tech aggression".