Out gassing is exactly what I was talking about. And yes, power will immediately stick to a hot part. I do it all the time. Getting a good result consistently takes practice. I've been doing it since 2009 and still have a part I'll have to do over sometimes.
That's the engine I did for a Bug I'm building. Orange is a really tricky color. Hard to get enough on the part. The silver vein pictured is a base clear. Time consuming. I love it though.