The best training I've seen for intertwining flames is Steve VanDemon's video "The Complete video Guide To Motorcycle Flames". He shows you how to do it step by step. This video is all you need to learn this style. It also helps you learn general techniques for custom painting. The video is spendy, but it's worth it. I think I bought mine from Coast Airbrush for about $35. You could check ebay, or spraydepot.com for a cheaper price. Jon Kosmoski made a couple videos also that helped me a lot.