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This video shows how I powder-coated the steel housing of the 4th Axis that I made.
I used my Eastwood Dual Voltage Powder Gun to apply the powder coating, andthe color is Ford Dark Blue.
My air supply is filtered with this Coalescing Filter and desiccant dryer combo, which supports the high airflow that I need for plasma cutting but it’s larger than would be needed for just doing powder coating. I added a small pressure regulator and replaced its gauge with a low-pressure 0-15 PSI gauge so I can accurately adjust the pressure to about 8 PSI / 55 kPa.
For masking the areas that I didn’t want to powder coat, I used Polyester Hi-Temp Masking Tape.
The video shows the Temperature Controller that I used along with a Solid State Relay to control my kiln. These are widely available and most any of them would work for an application like this, provided that you get a relay able to handle the maximum current of the oven.