It actually puts the other two bevels into use so you are getting maximum use of the coatings on all the four bevels by flipping the blade. It does not help the egde though. A light wipe would not remove the coatings which are baked on under high temperature.I also flip the blade, this does absolutely nothing with extending blade lifespan, its just an old habit and helps me keep track of the amount of shaves i get, i do this purely as a way to keep track of how well my pre shave routine has been working.