Also for those who aren't familiar, there's also "hand scraping" for flatness which is more common and used for things like refreshing the "ways" (ie precision

Also for those who aren't familiar, there's also "hand scraping" for flatness which is more common and used for things like refreshing the "ways" (ie precision linear bearings) on a lathe or other precision machine tool. This is done like the "dye / rub / scrape" method described above, which I believe is still used as it's superior to grinding for these applications. See video below for the process: https://www.youtube.com/watch?v=T7w84CrBEE8 https://www.youtube.com/watch?v=T7w84CrBEE8