I've been spraying for 30 hours now (not straight, but since I started it's been 30 hours). I can't feel the tip of my finger on my right hand.
I have learned so much already from this guy (who is not very good but at least he's explaining it to me. there are a bunch of these he's a lot better than I am, but it's not what I'm going for in the end.
that and i learned that there are different caps on spray cans to make them adjusted to the style you're using. that's going to make a huge difference when i move up to a better set of rattlers.