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Browning The Steel: Then I started the process of browning the barrel and the metal pieces using my sweat box. The box is approximately 48" long with a 60 watt light bulb in the end. I drilled two holes on either end with a 3/8" drill bit. This allows convection circulation thru the box. Placing a thermometer and a humidistat inside the box, I was able to maintain a 80oF with a humidity of 80% inside the box.
Hoot AL Rifle Shop
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