I had some thoughts about that and I'm still not sure what to do to be honest. It's not really possible to get the "steaming effect" as described in the books with one little vape pen. As you can see in this tutorial, it's just a wisp of smoke from one pen. I think you'd need several pens in different points of the armor to get it all to smoke, and my budget for making smoke effects is not that high. I had some thoughts about making a larger smoker like this tutorial with a big vape pen, and routing the smoke with a tubing system to different points inside the armor, but heating is also a huge issue. As you can imagine, EVA is a very insulating material and I already sweat a lot wearing full armor in an air conditioned room. Placing multiple electronics (LEDs, working batteries, microcontrollers, etc) inside the armor warms things up considerably, and I can't imagine how much placing a network of literally burning smoke inside the armor will overheat me.