After some months working on revenue projects, I've finally gotten back to the layout. Current task is painting rail. Working on the time honored principle of fire, aim, ready, now that I've made a mess of it I'm seeking advice. Well, not that awful, and that's what chainsaws are for, right? But please share your tips/experiences. What I've discovered: Paint pens marketed for track painting don't work very well. They don't cover well and I associate those colors with cleaning toilets. Fast…