Airbrushing your glow effects is certainly speedy. I did four plasmaguns in about 20 minutes. Afterwards I used a traditional brush to define the lines a bit more. There is one disadvantage in that they look "dusty" but for the time input to the appearance output, pretty damn efficient.
This was the last step on these models and to be sure not to get any unwanted overspray, I masked off the rest of the mini with iwata masking tape. I don't like using overspray to get the glow effect on anything but the gun, because it begins to look even more unnatural.
What do you guys think of using an airbrush for glow effects?