What can I use it for? How does it work? Well a cabinet scraper is essentially a sharpened blade just like a plane or a chisel. It removes a very fine shaving and offers a real tactile feel to the user. You can remove your enamel with a scraper, you can remove glue after binding, it can be used to check strips and see if a mark is a worm hole or just a surface imperfection. Even working with nodes it gives you a safe way to scrape things without digging into the material.
Like any type of blade it needs to prepped, the mill marks removed, the surface flat then sharpened for use and ultimately burnished to create the burr. Treat them carefully as they are a blade, this tool often gets chucked around and will get chips and dings so protect the blade when not in use. There is plenty of information regarding sharpening scrapers and it may seem confusing but learn to use and sharpen the lowly scraper. You won't be disappointed.