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After verifying the welds are flat and the contours are smoothed, Ron breaks out a draw file to reveal any low spots on the tank -- this process is called metalfinishing. Any areas the file does not touch are worked-up with a hammer and dolly, then refiled. This procedure is repeated until the file touches every part of the tank. Filler could be used at this point if the tank is to be painted. But if polished, the draw file process is the only acceptable method. View Related Article
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