Do any of you use hard surfaced mower blades? I used to do this on our batwing mowers to keep costs down. Downtime to replace blades and sharpen them was reduced significantly when we went to having our blades hard-surfaced with nickel. They sharpened up with a little more effort but seemed to maintain the edge longer. I keep seeing all the old blades piling up that have pretty much been sharpened to the limit and was curious today as to why we did not have hard surfaced blades on our ztr mowers. I know the cost has a big deal to do with doing this but reducing downtime and sharpening costs may make it worthwhile. Any of you done this? What were your results?