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In the old days movie houses used carbon torches, I have a carbon torch that attaches to my electric welder, and when needing to heat a small area for what ever, I sharpened a carbon stick, insulated one end and attached an electric lead, then attached another lead to the work to be heated, then attached the leads to a 12 volt auto battery, no one believes how effective something that simple works.
F.Guffey
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