Card scrapers are some of the most useful tools in woodworking but although they’re really easy to use, it’s notoriously hard to learn how to sharpen them. I struggled with sharpening these for a long time until I made one modification to my sharpening technique and that was to apply very light pressure with the burnisher.
3pc Scraper Set: http://amzn.to/1XCTQ3X
Convex Profile Scrapers: http://amzn.to/1XCTVVg
10″ Bastard File: http://amzn.to/1XCUePT
4000 Grit Waterstone: http://amzn.to/1XCU5vD
8000 Grit Waterstone: http://amzn.to/13Z15ia
Sharpening Oil: http://amzn.to/1NYX6kX
The final result of the sharpening process is to turn a sharp corner (left) into a hook (right).
The first step it to prep the edge of the scraper with a file. This levels the surface and starts to form a nice crisp corner.
Next is polishing the face of the scraper. I start with a 4000 grit stone.
On the same stone I’ll polish the edge of the scraper. I like to do this freehand but you can also use a block of wood here as a guide.
I can next repeat the polishing steps on my 8000 grit stone
Now comes burnishing. The first passes are with the burnisher held square to the face of the scraper. I use light pressure here. Only the weight of my arms is pressing the burnisher down. I do 4-5 passes.
Next to roll the hook, I tip the burnisher a bit and repeat the burnishing passes. Again, only applying light pressure.
Now the scraper is ready to be used. I sharp scraper will produce really nice wispy shavings.