I recently learned that uncharred punk wood can catch the sparks of steel struck against a hard rock such as quartz or flint. Here's a video demonstration by Flintlock (on BushcraftUSA) using sugar maple punk. This blew my mind and opened a whole new world of possibilities for me. Hope you find it useful too!
http://s132.photobucket.com/albums/q...rrent=PUNK.mp4
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