It’s very important that you soften all machined or hand-planed wood edges before applying any film-building finish. The finish will peel away from sharp edges (as is shown in the example) if they aren’t rounded over a little.
It’s also a good idea to soften edges when using non-film-building oil finishes. Sharp edges dent easier than softened edges.
You can easily remove the sharpness from edges with several light passes using medium-grit sandpaper.