There is an obvious environmental benefit as powder coatings are VOC-free and do not generate hazardous waste. Because it is a 100 percent solid there is no need for mixing with solvent and any other additives required to either adjust the viscosity or the dry time. With powder, there is no need for primers such as vinyl wash, commonly used on aluminum. Powder coatings come ready to use and do not require as much application skill as liquid paints. Usually a two- to three- day training program will allow an operator to be comfortable in production. It also translates into fewer rejects. On aluminum as well as CRS, the surface preparation is equally important with both liquid and powder. Failing to properly clean and etch the surface will result in brittleness, poor adhesion and severe field failures due to poor weatherability. In most cases, powder as well as liquid paint will perform well on aluminum but for outdoor application, a chromate conversion (or chrome-free substitutes) would be preferable. Physical and mechanical properties of powder coatings generally exceed their liquid counterpart. Because powder coatings are a solid product, there is no possibility for color adjustment.
More information on your current process and pretreatment and end-use is required to compare the capabilities of these coatings and their performance expectation.