Minimal effort, maximum impact, these are the customs that are most fun to make!
...But this wasn't one of those, I had to learn to sculpt and paint flames.
Searching for tutorials on how to sculpt flames gets you a lot of hits for hot glue videos with varying degrees of success, or sculpting little torches for minis. In the end I just said screw it and winged it as usual. It wasn't that hard! I was going for a reverse mohawk that flows from back to front, because I'm not into ghost rider's usual flaming afro. Also, I think this looks better with the Mad Max/dystopian clothes.
I was dreading painting the flames on this fig, but it turned out alright. Like a blonde flame maybe?