Susan asked in the comments about using the soldering irons. There are lots of techniques using the soldering irons and you can get really fine tipped ones. The diffinative book I have seen is "Burning issues" by Margaret Beal, and you can get soldering irons from her too, if you email her. Google her and you will find it, or check out workshop on the web's traders mall.
What I did was to use the tip to burn holes through felt(acrylic) and also to score lines in the surface. Hope this helps.
Love carol T