Hoss is right.
It's a pretty vague question to answer without spending a ton of time doing a step by step. I did have a step by step, but this was just to layout flames. The step by step was made after the painting was already done and the surface was prepped ready for the flames.
In a nutshell, to prep the parts for flames, you basically want to make you 'scuff' the surface very good. You can wetsand your current surface with 1000 grit. Be sue and get rid of all the shiny spots. Once you do this, you layout your flames, mask up the rest of the areas that are not getting painted. Then you can paint your flames, remove all tape, clean the surface, then clearcoat.
Just the basics, but this should help you.
Good luck to you!
:cheers: