Ok, here's a pic of my scraper, the edge burnishing is achieved by just holding the blade edge at 45 deg against a hardened edge (I use my vice jaws) and dragging the blade with some force along it so as to fold the the sharp edge over.
Now you can drag that edge along your binding with no risk of digging in, also you will find it takes much less effort to remove stain and varnish than a straight Blade.
Hope that explains it.
Btw
I use the same procedure to make a fretboard scraper.