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How To Keep Paint From Peeling
Bob Moty, Crystal Lake, Ill.: “I was a welder for 35 years and invented and/or made many things. Before I spray painted any of the pieces I built, I used the following process to keep the paint from peeling.
  “After welding I would first scrape off the weld spatter, then wipe it down with lacquer thinner or a similar solution to remove the oil and grease. Then I used a gas torch to ‘sweat’ the metal. To see what I mean, take a gas torch and slowly move it across some clean, unpainted metal, and you’ll see the moisture come to the surface and evaporate ahead of the flame.
  “When you’re finished, the metal should be lukewarm but not hot, to the point that you can lay your bare hand on it comfortably for about 5 seconds. Then spray paint it immediately, and you’ll never have a problem with paint peeling again.”

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2015 - Volume #39, Issue #3