Why is it important to properly clean the surface before painting?

Properly cleaning the surface before painting is crucial for ensuring that the paint adheres well to the substrate. If the surface is contaminated with dust, grease, or other residues, it can lead to poor adhesion, resulting in defects such as peeling, bubbling, or flaking of the paint finish over time. The bonding between the paint and the surface is essential for a durable and long-lasting result.

While enhancing the gloss of the paint or reducing the amount of paint used are considerations during the painting process, they do not directly address the fundamental need for a clean surface. In the case of protecting the surface from rust, it is also important, but this aspect is more associated with priming and rust prevention measures rather than the immediate concerns tied to painting adhesion. Therefore, the emphasis on proper cleaning is primarily focused on achieving the best possible foundation for a smooth and effective paint application.