What is a common method to remove contaminants from a painted surface before refinishing?

Using a degreaser or solvent is a widely accepted method for removing contaminants from a painted surface prior to refinishing. This process is essential because contaminants such as grease, wax, oils, and dirt can interfere with the adhesion of the new paint or clear coat. If these substances are not adequately removed, they can lead to issues like peeling, bubbling, or poor surface quality after the refinishing process is complete.

Degreasers or solvents are specifically formulated to break down and dissolve these contaminants effectively. They are often used in conjunction with clean, lint-free cloths to ensure that the surface is properly prepped for the application of paint. This method helps to create a clean and stable base, which is critical for achieving a professional-looking finish.

Other methods listed do not effectively address the issue of contaminants in the same way. While washing with soap and water can remove some dirt and grime, it may not effectively eliminate more stubborn contaminants like oil or wax. Sanding aggressively might remove some surface issues but is not a solution for cleaning; in fact, it can create further problems by introducing additional scratches. Ignoring minor scratches is not advisable, as they can also affect the final appearance and adhesion of the new coating. Thus, using a degreaser