I have never realized the beveled area was supposed to be there. It's hard to see in my pic but there are concentric "scalloped" marks or "arches" in the bevel that looked like wear. That being said.....can the valve be saved through polishing?
Use 600 grit.Try not to remove material and leave the sharp edges at the end of the lands.Put it in the bore and use a small magnet to stroke it back and forth in the bore.When it goes in and out nice and doesn’t feel sticky you’re good to go. You don’t have to remove all the scratches.