Card scrapers remove unwanted milling marks and other surface blemishes and provide a better finish than sandpaper. The 301 stainless steel of these scrapers burnishes well and holds an edge. When the scraper edge is burnished using a burnisher tool
, a tiny bit of curved metal known as a "burr" or "hook" forms along the edge of the scraper. This burr or hook can create ultra-thin shavings on even the most complex-grained hard or soft woods with minimal tear-out, chipping, and dust.
The rectangle scraper is for smoothing and removing finishes from flat surfaces. The combo rectangle/curved scraper has four sides with two curved ends. One end is convex, and the other is concave. The curved ends are for rounded or hollowed objects, and the straight edges are for flat surfaces. The Gooseneck scrapers are good for smoothing curves with different slopes.
Stumpy Nubs YouTube Video:
Fine Woodworking on How to sharpen a card scraper