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The second element to spraying is fan pattern. You want an even-flowing fan with good fluid consistency. The top fan is just right. It's even, consistent, and smooth. Notice how the top and bottom edges of the correct fan begin to fade; it's because of this that 50 percent overlap passes are necessary. The middle pattern is too little air pressure, which results in a blotchy fan. The bottom is too much pressure. Too much pressure creates excess material being projected in the air, which essentially creates no fan. Several knobs on the gun control fan pattern so familiarize yourself with your gun before getting started.