The Mystik scraper isn't sharpened like a conventional scraper. With most other scrapers you square everything up with a file, then stone, then smooth and roll the edge into a burr with a burnisher.... not so with the stainless Mystik.
Bernie Swank from Mystik Longbows showed me how to sharpen his scraper years ago. Here's how.
Sharpening the Mystik scraper is done entirely with a smooth cut metal file.
Often you can sharpen it without going back to square one and completely removing the old burr first.... but if it doesn't work to your satisfaction, you may need to completely remove any old burr and perfectly square up the edges.... again, done entirely with the smooth cut file. But unless it's really messed up you should be able to just push a new edge.
Hold the scraper in a padded bench vice with about a third of it exposed above the jaws of the vice, and with a smooth cut mill file held perpendicular to its side(file level with the floor) begin running it, skewed to about a 45 degree angle, along the scraper's edge. As you work, gradually tilt the file a few degrees away from perpendicular, leaning it down on the side you wish to create the burr on, similar to how you roll the edge on a cabinet scraper with a burnisher. Of course, you lift the file after each forward stroke, not run it back and forth like a burnisher.
You should be able to accomplish your task in 12-20 strokes or so. The file will push a cutting edge off the edge of the scraper just like a burnisher does, but a burnisher won't work for squat on this stainless... go figure
. That's about it. It's easy and fast. The longer you do it and the more you lean the file, the greater the burr. Do the same thing to all four corners. Play around with how far you lean the file over, and how much you skew the file. You may want to run the file closer to parallel with the scraper, or more perpendicular to it.
If you try to reconstitute an old burr but it won't cut wood, file it off, square up the scraper's edges, and start over.
The only thing I don't like about the Mystik scraper is that the burr created by the file can sometimes be slightly jagged, which can leave tiny grooves in the wood. To help eliminate it, skew the file at a greater angle, laying it more parallel to the scraper. Also, since the teeth on the file are angled, it will cut slightly different depending on whether its pushed or pulled... usually leaving a smoother burr on the scraper one way than the other. Experiment til you find what works best. Once you get on to it, it really is easy though, fast, and it works. Good luck. Let us know how it works for you.
If this description is unclear, I can post pictures. Let me know. Good luck.