Getting a perfect burr on your cabinet scraper takes practice. If you don’t have a long time to spend learning to perfect the process, Ulmia’s Burnishing Block, invented by George Ott, lets you get back to scraping quickly. The Burnishing Block works with any square scraper.
Ulmia makes the block out of steamed red beech and covers it with natural varnish. To protect the wood block they line the scraper path with a galvanized steel angular guide rail. The steel that does the burnishing is hardened to 64-66 RC and replaceable. The whole tool measures 160mm (6.3″) x 50mm (2″) x 60mm (2.3″).
You can pick one up at Peck Tool for $83 plus $11 shipping.
Burnishing Block [Ulmia]
Burnishing Block [Peck Tool]