What Grit Sandpaper to Use for Car Touch-up Painting?

[DiKinsley]

Before spray painting the car, rusted areas need to be sanded with 80-grit fine sandpaper. Below are relevant introductions about paint surface sanding: Introduction to sandpaper usage for car spray painting: Polishing and waxing treatment can be performed on the car body to restore paint gloss. Moreover, the wax layer formed after waxing provides certain protective effects. Regular paint maintenance should also be noted - maintenance procedures like waxing, glaze coating, film coating, and crystal coating can all protect the car paint with excellent maintenance effects. Precautions for car touch-up painting: Touch-up paint colors are all custom-mixed before repair. During vehicle operation, paint gradually fades - while indistinguishable to the naked eye, the fading degree slightly varies when viewed from different angles under sunlight. To achieve optimal color matching with the original, custom color mixing is essential. If the original paint is pearl paint, imported paint should be used for touch-ups to ensure good spraying effects and stronger paint durability/weather resistance. Avoid repair shops without dedicated paint baking rooms. Although touch-up paint requires lower baking temperatures, this doesn't mean baking can be omitted or substituted with other methods.