Twin-feed spray guns

In this method, the finish and activator are metered mechanically along separate feed lines and mix only at the instant of application, usually after both materials have left the application equipment. Special twin-feed spray-guns have to be used. The main objections are that sometimes mixing is not efficient enough and faults in the mechanical metering device can lead to insufficient or excess peroxide. If mechanical failure occurs, the defect will probably remain undetected until several objects have been coated and probably ruined. However, the latest equipment is quite good and the method is particularly suited to electrostatic spraying. 

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