I start with clump foliage, roofing nails and super glue.

Starting at the bottom, randomly glue pieces of clump foliage to the nail. It doesn't matter what size the clumps are but pay attention to how much you put in any particular place. You want the clumps to be irregular but you want the circumference to be fairly uniform and balanced all around, lest your fire and smoke be tippy.

Continue building up the foliage until the top of the nail is covered and there are no gaps.


At this point you can trim the foliage with scissors to get the shape you want, keeping in mind the desired effect is a column of billowing smoke.

These are standing on a polyethylene bag because superglue will run everywhere until it dries but it doesn't stick to polyethylene. There is considerable odor from the glue so plan accordingly and expect to get your fingers covered with the stuff so have some CA release agent close at hand.
At this point I glue a brad to the bottom of each smoke plume to facilitate the next stages of coating and painting.
The next step once the superglue has dried is to coat the piece in something to make it hard. I have used superglue, which is fast but odor is a problem, matt medium, PVA glue, scenic cement or modeling paste work well but take longer to dry, and with the exception of modeling paste may take two or three coats. you want these things to be rock hard when you paint them.

Once the coating is dry I airbrush them with Vallejo black primer making sure no green shows. Then start building up flames on the bottom with red, orange and yellow paint in that order. These are Tamiya acrylics. It is OK to blend the colors a bit and because the 'smoke" is irregular you can't be too particular about exact flame shapes. I can't tell you how many youtubes I watched to try to learn how to paint flames!

Once the flames are painted to your satisfaction - and don't be too OCD here, I lightly highlight the black smoke with some dark gray and them spray them with matte varnish to seal them.


Snap off the brads and they are ready to go:

I have also made these with washers and wire instead of roofing nails but the roofing nails have the benefit of skipping the step of forming the wire and gluing it to the washer, plus they have a fairly wide base.