Didn't work for me, the edge end up worst and wouldn't cut paper. I tried going in one direction only and managed to achieve burr. I removed it on a sharpening rod by going sideways and not up and down so it folds back. Still not that great
Well, cutting Paper is very diffucult with serrated knives anyway. I test them with a piece of dried bread or a Burger bun, there you'll see the progress better 👍. After some time it'll work.