Johnny - I have not read that article yet, and I have not used the Rust-Oleum product. I do use Model Master "Light Earth" rattle cans to spray paint my track and ties after I spike everything down and test for a while. I spray about 2-3 feet at a time and immediately wipe off the tops of the rails with a folded paper towel, before it has a chance to dry. A day or two later, I take several bottles of various shades of Polly S brown paint, such as Rail Tie Brown, Rooftop Brown and Boxcar Brown; as well as some gray and Grimy Black and randomly paint over some of the individual ties for variety. Maybe 1 out of every 7 or 8 ties gets a different shade.
As a side note. The Light Earth color works well for coating the plywood prior to applying ground cover. I sprayed some on a piece of paper and took it to my local Home Depot, and they matched it with a spectograph and mixed up a quart of paint for me for about the price of two rattle cans. I still use the rattle cans on the track because it is easier and more convenient. I'd guesstimate that I get about 120' of track per can.
Willie