My guess is with an iron. The irons I am thinking of look like a big electrical circuit soldering iron with a little triangular iron at the end. I guess there is not enough heat inside to pose a problem and the swipe of the iron is quick enough that it cools pretty quickly. These would be similar to a lead iron used to do bodywork on old cars.
-------------------- He who lives in the past is doomed to enjoy it.
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Re: How did they seal the old tin ammo containers?
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