In order to get some practice I've been touching up my razors every 7 shaves, whether they need it or not. I do 10 laps on a Naniwa 10k and 10 laps on a Naniwa 12k followed by 7 laps on Chromium Oxide. I know the Chromium Oxide alone would be enough but I really need the practice on the stones. Am I doing any harm to my razors by touching up so often?