Conversation Between HauntedMyst and jayar

Sorry to bother you but I've been looking at rc paintjobs for a while now for a certain look that I want to try to achieve on my new slash body.

My question is how do you highlight the edges of the body with a darker color.
Ive asked this on the forum but I always get vague answers.
Ive tried doing it with a fine line of the air brush but my hands arent steady enough.
What's the secret to getting such a uniform pattern.
I really like your work and and i'm not trying to be a pro but would only like this one paint job to come out nice.
Thanks J.R.