The standard provides five methods for preparing uniform thickness coating films on test plates, including automatic lame plating, electric dip coating, doctor blade Spreader, hand-held spray gun, and hand-held blade application. This method is suitable for lame plating of objects in the factory or in the field, especially when evaluating the Appearance characteristics of metallic coatings such as Gloss and Color. The standard states that Coatings may exhibit slight orange skin or spray wave phenomena, and these methods help to ensure the conformity of coatings and Reliability of test results.