Most everybody I read uses negative rake scrapers with a burr. Some just use the burr off the grinder but others hone that off and make a new burr.

Now I'm seeing carbide tips ground in NGR profiles. How well does work since, to my knowledge, you can't put a burr on carbide? Even if you could it would be so brittle that it would break off immediately I think. Maybe these tips work okay on very hard woods?