I'm afraid you may be out of luck on this one. With the exception of Himilayan Imports, most of the Kukuris that we get in the US are made of mystery metal. They're all recycled, and some aren't even ferrous. To test the metal, the best way I would know is check first to see that a magnet sticks, then, if it does, spark test to see if it has enough carbon in it to harden. Then take an educated guess on what kind of steel it actually is to decide on heat treating techniques. Then you would have to disassemble the blade, heat treat it, and repolish after heat treating. A lot of variables there, and it's a pain even when you know the answers. Wish I had something more upbeat to tell you. Once you know what the steel is, you'll be able to decide if it's worth it or not. Have fun!
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Oz
"Never try to teach a pig to sing.
It's a waste of time and it annoys the pig."
-Lazarus Long
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