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Many experiments have been performed globally to investigate ways of controlling and improving adhesion of energy curable UV paints, inks and coatings utilized to decorate structural polymers. Automotive plastics with a low polarity, such as PE, PP, TPO, POM, PUR and PTFE typically require surface treatment when value-added decoration is required. Metallic surfaces may also require cleaning to remove low molecular weight organic materials prior to decoration. Once the above-mentioned interior and exterior grades of substrate surfaces are cleaned and activated, printing, gluing and painting are possible without the use of adhesion-promoting primers. There is a class of innovations in three-dimensional surface treating technologies for plastics finishing which address the need to advance adhesion properties of decorating materials, increase product quality, and achieve environmental objectives within the automotive industry.