Oh, I agree completely. I was not suggesting that this should become part of ones regular wheel cleaning routine. I did this as a one-time thing to clean a set of wheels that i acquired that had considerable brake dust accumulation from several years of use. from now on, i will use only mild soaps and such. I was just suggesting it for those who have negelected their wheels for a while and want to get them back to like new condition. you a perfectly correct that long term use of caustic products like sodium hydroxide would be detrimental to the finish.