ok, the area I live and work in has light silty clay, usually (and this year is no exception) rather moist, and no sand, no rocks. The first cut will peel, but when you spread some sticks, pretty soon you have a yard or more of dirt stuck to the blade. This steel I put on had a dark gray coating which I guessed was mill scale or maybe case hardening layer. Anyhow after a day of hard work it looked exactly like it did when I welded it on. pretty and smooth, but wouldn't scour dirt. I took it back to the shop and polished it out with 80 grit and it looked a lot better, but dirt stuck just the same. Every half hour or so I have to shovel it all off, trying to get at least some dirt movement across the moldboard. This is no different than a plow, the moldboard must be soft enough to polish, but hard enough to last. This is why I am wondering if I should have used a much softer grade of steel.