Here are a few pictures that show the finished work.
Remembering that this is my first attempt at them, I can see a few "areas for improvement":
1) Don't spread the hot glue everywhere. You can see in a few pictures that they glue is visible as globs and strands. Painting won't hide it, so cleanup is necessary prior to painting - like putting more foliage over the exposed area.
2) Use another coat of grey. I went black twice, then grey twice. I am thinking another grey and maybe even a lighter grey on that third coat.
But I really do like the effect and look of the marker. In one of my games, there was a conversation about concealment through a destroyed tank. I had to remind my opponent about the 2" rule (sorry, don't know the cm measurement). The marker helped illustrate that.
So without further ado, here are the pictures:
You can see the glob of glue and a strand. The strands should be easy enough to cut out. From an artistic view, I think a heavier airbrush at the top and lighter on the bottom would be a better look to the explosion. In other words, show more color of the foliage at the bottom and not the top.
Ok, so they don't look like Shawn's (The Terrain Guy), but then what mere mortal's work does?!? I have to admit I really like the look and effect. I did see another player that had an LED flashing under his marker. That made me think... nahhh. Or did it?!?! :-)
Simple to make, but remember the hot glue! White glue, terrain glue and even super glue will work, but I found the hot glue to be much, much easier to handle.