Originally Posted by
ebrewste
Not sure it's a great idea, but "scraping" a hardened way with a grinder is possible. Google "scraping hardened ways grinder". You will see how people have replaced a scraper with an angle grinder for hardened way. I honestly wouldn't recommend it for you right now -- scraping is tricky and using your lathe bed as your first project isn't a great idea. In addition, you will not benefit from the amazing amount of scraping content on the internet in the last five years, because you would be using an angle grinder.
Once you scraped a couple of small projects in the conventional way (small angle plate, etc.), then maybe you could take what you know and transfer that knowledge to grinding with and angle grinder. Don't forget that scraping is not just getting things flat, but getting them aligned precisely, as well.
Hope that is helpful. If you do grind them this way, please document some (maybe make a thread here about it). It really helps the community to see what does / doesn't work!