The issue is that smooth surfaces lack pores, making acrylic paints easy to peel off. This limits their use in scenarios such as model painting and industrial marking.
PretreatmentUsers can gently sand the surface with fine sandpaper to create a slightly rough texture, which helps the paint grip better. Another option is applying a special primer, such as acrylic primer, to form a transitional layer that boosts the paint's hold.
Modifying the paint formulaAdding adhesion promoters, like chlorinated polyolefins, to the paint can strengthen the intermolecular attraction between the paint and non-polar materials such as plastic. Tests show this can improve adhesion by 30% to 50%.
Post-treatment for reinforcement**: Once the paint dries, spraying a layer of transparent protective paint (e.g., acrylic brightener) forms a protective film. This not only adds a safeguard but also enhances the paint's resistance to wear.