How can you tell if a surface is ready for painting?

A surface is considered ready for painting when it is clean, dry, and free of defects. This ensures that the paint adheres properly and achieves a uniform finish. Cleaning removes dust, grease, and other contaminants that could interfere with adhesion, while ensuring that the surface is dry prevents issues such as bubbling or peeling once the paint is applied. Additionally, a surface free of defects, including cracks, holes, or flaking, allows for a smooth application of paint, which contributes to the durability and appearance of the final coat.

The other options may imply certain characteristics of a surface, but they do not address the essential requirements for proper surface preparation. A smooth and glossy surface may not effectively bond with paint unless it is adequately cleaned and prepared. Previous paint may be present, but it is more important that the current surface conditions meet the right criteria for painting. Light color may help in achieving a better finish depending on the topcoat, but it does not determine readiness as much as cleanliness and defect-free conditions do.