New Painter Requires Help

Hi,

I am about to create my own VA and have decided that i will have a go at painting my own fleet, to start with i have the IFDG Airbus 319.

Now, i am using the IFDG Paint kit, so the actualy painting bit isnt that diffuclt, i have got the base coat on, but what i would really like is something similar to the wavy lines on this aircraft:

http://library.avsim.net/sendfile.php?Location=AVSIM&Proto=file&ImageID=115190

How do i go about painting wavy lines like this?

any help is apprecieated.

Thanks

BB