Xuron Corp. has introduced a hard wire cutter that is designed with by-pass cutting which leaves flat ends rather than compression-type cutting which squeezes and deforms the wire.
Those stick-type hot wire cutters from the craft store that plug into the wall aren’t much better than a knife. The actual cleaving of foam is easier, but dragging a long, hot flexible wand ...
Your multi-purpose wire strippers are the right choice ... Most strippers, including the Klein Tools K1412 Dual NM Cable Stripper/Cutter (our favorite home-wiring tool), will come with threaded ...
While there are all sorts of ways to build a hot wire foam cutter, this design from [jasonwinfieldnz] is both interesting and imitable. If you don’t already know it, nichrome wire is nifty stuff ...