- Joined
- Jan 2, 2014
- Messages
- 9,606
Years ago I found an article in (I believe) Popular Mechanics (one of the old "Do It Yourself Encyclopedia" books) where they use sulfuric acid directly from an automotive battery to "sharpen" files. I do believe it would reveal a new cutting edge, but (like others above) I worry that it's not very controlled. But of course, it's for hand filing, not machine grinding, so maybe it doesn't matter......
-brino
-brino