Both depending on the look you are going for. Most of the horns I make I am scratching the surface, not cutting. But that is the look I want. Coryjoe[/quote)Exactly what he said.I use an exacto knife with a #11blade broken off real short. Then I remake the blade section so it is very small. When I am done, the cutting edge is only about 3/16" long and close to the handle. I use both technics mentioned but mostly just scratched. I am no scrimshaw artist by any means.
Mike R, If you have a diamond stone or dremel diamond wheel you can reshape the carbide points from round to more of an ellliptical shaped point which cuts as much as scratches. I pretty much just use the diamond stone to touch up that scriber point before I start using it as they aren't real sharp out of the package.