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Key differences comparison: Performance advantages. Water-based paints, especially polyurethane-based water-based paints, have wear resistance several times higher than that of oil-based paints. Their film hardness and scratch resistance are on par with those of oil-based paints. Moreover, they are better suited for various materials such as metal, wood, and plastic, offer strong adhesion, and do not easily peel off. Oil-based paints tend to bubble and become brittle when exposed to water. Over time, the organic solvents in these paints gradually evaporate, which weakens the structure of the paint film and thus shortens its overall service life. Advantages in weathering resistance: Water-based paints do not contain harmful substances, and they do not accelerate aging due to the evaporation of their components or chemical reactions with the environment. High-quality water-based paints exhibit excellent weathering resistance and UV protection, and they are less prone to yellowing or crumbling. Oil-based paints contain organic solvents, which not only cause them to yellow easily, but also, as these solvents evaporate over time, they continue to damage the paint film’s structure and reduce its durability. Verification in special scenarios: In the corrosive atmosphere of chemical plants, the protection duration of high-performance water-based epoxy paints is 3-5 times longer than that of oil-based alkyd paints ； In applications such as outdoor exterior walls and fences, high-quality water-based paints can also address the problems of flaking and peeling that are common with traditional oil-based paints. Additional note: Oil-based paints still have some advantages in very few cases involving extremely high corrosion levels or special substrates; in most everyday renovation and industrial protection applications, water-based paints offer superior durability.