This next picture is a good one to let you see just how the finish is looking. The wall to the left is what I started with. Quite a dramatic difference after the glazing goes on. I use a two pass technique which I developed. This technique allows me to work on large areas without worrying about the dreaded "overlap" lines.
Perhaps the biggest challenge in creating a look like this is making sure you get that "consistently inconsistent look" over the entire wall. You want those darker areas and lighter areas but you want them to be fairly uniform without being a repeating pattern. Now, a large part of that challenge is to not get any of the "overlapping lines" on your wall.
An over lapping line occurs when the glaze has dried on the edge of the application area and then when you go back to that area again and overlap onto it. Look at the next picture. This is where I finished at the end of one days work. When I come back the next day and pick it up again I don't want to see a line down the wall where I had stopped and started. So what I do is create a stopping point like you see. On the leading edge of the glaze, after I apply it, I take a cotton rag and wipe it back taking off most (if not all at the start) of the glaze with it. I probably wipe off about 5-6 inches of glaze, feathering it back from the edge.