Hope you didn't think I was saying you couldn't do it.Not what I meant at all.
I've tried it myself several times and the whole key to pulling the effect off is this... and as posted about the Challenger...
an ARTIST did the graphic.
You DEFFINETLY have to have an artistic gene (or several)to "visualize" and freehand,it IS 100% freehand,the job.
I watched Craig Fraiser do his verson of it and his was simpler and done with less colors and did look quite nice BUT,
Craig is an artist of world class and he can make the simplest effect LOOK easy till you get the airbrush in YOUR hand.
I've watched Mike's procedure several times and due to my family being mechanically inclined instead of artisticlly,I do what is in my realm of abilitys and True Fire will be safe with Mike.(for awhile anyway....