I bought one of those burnishers years ago. I used it on a variety of scrapers including some that were very large.
That burnishing tool can be very aggressive because of the leverage the pin at the rear gives you. It can easily create a burr that is much too large to be useful. When used gently, it's fine.
I quit using the thing at least 10 years ago and instead use burnish with hand tools. I started with a fairly large diameter carbide rod then went to a smaller rod. I like the small one better.
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My favorite burnisher now is made by Arno, has a round rod on one side and a triangle on the other side. The triangle actually as a small radius on the working edge rather than a sharp edge so it really works like a small diameter rod. The triangle is more aggressive than the round rod. Sorry, I can't find a pic of the Arno.
I use the hand burnishers for scrapers, negative rake scrapers, and hand scrapers.
JKJ