When preparing existing painted surfaces for repainting, who is correct?

In preparing existing painted surfaces for repainting, it's important to recognize that both technicians can provide valid techniques that contribute to a successful paint job. Proper preparation is critical for ensuring adhesion and achieving a smooth finish.

Technician A may suggest a thorough cleaning of the surface to remove any dirt, grease, or contaminants. This step is essential because any residue left on the surface can interfere with the new paint's ability to adhere properly. Cleaning is the foundational step in surface preparation.

On the other hand, Technician B might emphasize the importance of sanding the existing paint. Sanding serves to scuff up the existing surface, creating a texture that allows the new paint to adhere better compared to a slick, glossy surface. It also helps in removing any imperfections, such as scratches or uneven areas, thus promoting a more uniform application of the new paint.

Both cleaning and sanding are part of a comprehensive approach to surface preparation. Each technician's recommendation addresses a crucial aspect of repainting that contributes to the overall outcome. Therefore, recognizing the validity of both technicians' practices leads to the conclusion that both are correct in their methods.