I usually start with 3 laps on chromium oxide, 20 on clean HPW, then 50 leather, then finally shave test. I use the results from the shave test to gauge how many more strokes on chromium oxide I need. I recently did this with some of my razors and after the shave test, one razor needed three laps, one needed four laps, and one needed just a single lap...just an example to show how it can vary depending on the razor and that it's not a set amount of strokes.