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I tried that once using a bent wire coat hanger as the tip for a Weller soldering gun...it gets too hot and just melts the foam but here's what I ended up doing... <br />Cut a coping saw shape from a piece of 1/8 plywood. For the blade use a piece of thin nichrome wire...mine was salvaged from the element of an old electric heater. Make sure the nichrome wire is very tight between the bow of your "saw"...Silver solder a #20 or 22 feeder wire to each end of the blade (the nichrome wire). <br />I used an old Tyco trainset power pack to supply the current and it worked just fine. I gave it to a friend of mine years ago and he still uses it on occasions....CAUTION!!!...DO NOT BREATH THE FUMES THAT COME OFF THE EXPANDED FOAM WHEN IT IS CUT...THEY ARE TOXIC!!!...Vic
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