rooster57 said:
i have always wanted to try this and i even purchased a book what do you recommend for a starter brush or min supplies to practice with.
Start with a Mack 00 or xcaliber 000 brush, one shot paint and cut yourself a piece of glass (shown below) to practice on. The one shot dries quickly and you can razor blade it off an keep trying.
I made a box to hold my supplies and I always practice on it before I stripe something, it adds character or something

. In thw box is acetone to clean the brush, brush oil (3-in-1 is fine) my paints, some omnichrom pencils (for laying gridlines, but for some reason I never use them) and a small collection of brushes.
Here is my shop stool that was one of the first pieces I striped. EVERYTHING is now striped, by bandsaw, vice's, hand toold, cabinets, you name it. It is ridiculously addictive - and if you don't like it, start over.
When striping multiple colors, always lay the dark color down first - something I learned a little late but at least before I ever touched a car, heh.
Don't be intimidated, it's not all one line but the goal is to make it look like it is. You can freehand part of it but you really should have a plan to start something. For example, on the above image I knew where 3 lines were going to go (the vertical ones in the center) and then work from there. Form then on you work like a chess or pool game, always know where your next move is so you can start heading your line that way.
The first bit of practicing should just be pulling straight lines, then some curves, then move on to straight shapes, geometric, etc.
Again, I am no pro (or even any good for that matter) but that is all the advice I had picked up along the way.