Make an element that is called plastic (PLST) it should melt to melted plastic (MPLS) at 250 degrees and burn at 400 degrees but creates lots of smoke (SMKE).
There should also be Ballistics Gel (BGEL) that conducts electricity (SPRK) at the same rate as salt water, when a particle travelling more than 5 pixels per frame it is pushed out of the way and also, as above, burns at 400 degrees with lots of smoke. :P