The first company that I worked for after I came to this country built long-span steel trusses. He was painting them with a spray gun but realized that it was making a mess - think scraping the concrete floors once a week to clean up the over-spray (mid 60's, way before EPA) - as well as wasting a lot of paint. He built a tank - about 12" wide and 36" deep, I don't remember how long it was, just that he couldn't get the longest product in there - partly filled with water and with paint on the top. They would dip the trusses into the tanks, more than once I think, and pull them out coated with "red lead" paint. We made trusses long enough to span a basketball court, I remember all the problems we had delivering a job for a HS around Philadelphia - there was one turn - a right and then a left after one short block - where the back end of the load took out the traffic light on the corner. We'd knock it down, they'd replace it afterwards, and we'd knock it down again the next day - for almost two weeks.
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