How important is the long-term appearance of the paint in the field of agricultural and construction machinery? Therefore, the robustness of the paint with high demands on long-term appearance plays a significant role. Weber: Powder coatings and liquid paints are not directly comparable. The metamerism between liquid paints and powder coatings also plays a significant role. In the field of liquid coatings, the use of modern computer colour matching systems and well-formulated pigment concentrates allows for accurate colour adjustments.