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The approach is the same. You remove metal from the outside of the periphery of the punch end, at an angle roughly the same as it was originally. The contour of the round punch adjacent to the ...

This answer is not based on first-hand knowledge of sharpening wire loops, but is based on extrapolating what works for paint scrapers. Many years ago while performing one of those early-marriage ...

Sandpaper. Really, IMHO the best way to sharpen charcoal pencils is by using sandpaper (100 grit). Works really, really well and the result is perfect. I start by just rough-shaping it slowly and with ...

With a so small blade the best is to use a grinding stone. If it is very blunt you will have to start with a coarse grain and finish with a fine one. It will take a long time... Blades generally ...

the drill press is a good idea for being able to get the same angular cut or grind on the tool in question I would also suggest getting some needle files. you can usually pick them up at Harbor ...

Rust implies they are carbon steel. Although rust removes very little metal ,it will quickly dull a sharp edge. Many modern knifes are stainless steel ( 13 % chrome ) and resist rust well. If you use ...

Note that craft knifes of this size are generally reckoned to be disposable, and new are really sharp, but don't hold their edge well. I prefer a proper scalpel (or second best an X-Acto type) where ...