Does a full car repaint require complete removal of the original paint?

[DeIsabella]

When repainting the entire car, it is not necessary to grind off the original paint, but attention should be paid to color differences in the original painted areas. Relevant explanations are as follows: 1. Precautions: For paint mixing, pay attention to color differences. Take protective measures; areas that are not to be painted must be covered with newspaper or other isolation tools. Also, pay attention to the gun pressure and working environment during painting. Finally, consider the baking time. 2. Painting trajectory: The correct spraying trajectory should remain perpendicular to the surface of the workpiece. When spraying, depending on the angle of the surface being painted, the distance between the spray gun and the surface is generally 15~30cm. To achieve a wetter, darker, and thicker coating, the distance can be closer; to achieve a drier, lighter, and thinner coating, the distance can be farther.