Airbrush Flames?

[Norris]

I saw these other flames the other day and was wondering if you guys knew how to make them. Are they made by airbrush?

http://photos.cruisercustomizing.com/myphotos/photo.html?h=Cruisercustomizing &a=1730&ap=1&p=17456

 

[TAZ]

Yes, those are airbrushed on.