Hey,
Actually both the orange/yellow flame licks and the silver parts are outlined with the old Mack sword brush. The blue was done just like ezrider said, short choppy strokes with an 000 brush, and I did the red outline with an 00 brush. I'm still trying to get the hang of it, the dry brush look is easy to do, you really can't mes it up but you have to be careful not to let the striping paint get too thick with all those overlaps.
I talked with a local guy here that's been pinstriping for 25 years, and all he said was, "just find anything to practice on and keep going at it"
He uses some other brand of sword brush, wasn't Mack or Excaliber, I forget the name, something like F&H, I think it's a European company, and he uses 1-Shot enamels (I just used DBC base color).