If you want an unparalleled final surface for a woodworking project, try using a card scraper instead of sandpaper. The equipment is inexpensive, just a simple square of steel, a file, and "burnishing" tool. In this video, Bob Van Dyke of the Connecticut Valley School of Woodworking demonstrates how to use one. Watch this companion video for tips on sharpening the scraper.
Source:
http://www.startwoodworking.com/post/how-use-card-scraper
