As the powder passes through the gun, it is positively charged and mixed with air to create a fine cloud of paint temporarily suspended in air. A metal part that is grounded to earth would then be sprayed with the cloud of powder. The electrostatic charge created causes the powder to cling to the grounded metal part. The application can be controlled, so a continuous even coat of paint is applied. Using a conventional oven, a 16 gauge steel panel would require about 20 minutes at this temperature.
Different substrates require different curing times and temperatures.
There is an endless variety of colors and textures available from many manufacturers. There are gloss range options, color options, and texture options to select from when deciding what is right for your job. The condition of the parts should be considered when selecting a gloss range. Parts that have heavy grind marks would look better when painted with a flat, rather than a full gloss, because the gloss magnifies the grind marks. Custom colors can be made, but are expensive when ordered in small lots.