Hey, and very effective it is too, colour is spot on. Are you using oils? I had a set of Marshalls' oils given to me a few years back but haven't tried it yet, afraid I'll make a hash of it!
Tony- It's mostly oils. The thinner green lines are pencil, which are easier to control.
Every person I know (that hand colors) has a different technique. It's worth experimenting with. If you print on matte papers, save your rejects to experiment with. The learning curve isn't too long, to become competent.