Which actions are part of surface preparation for coatings?

• A. Cleaning, patching, deglossing
• B. Sanding only
• C. Patching without cleaning
• D. Applying primer without cleaning

Answer: (A)

Surface preparation for coatings focuses on getting the surface ready so the coating can bond properly and last. Cleaning removes dirt, oil, grease, and other contaminants that would block adhesion. Patching fixes holes, cracks, and imperfections so the coating has a smooth, defect-free substrate to cling to. Deglosing removes the shiny surface layer and increases surface roughness just enough to promote better adhesion. Together, these steps address the main prep needs: clean the surface, repair defects, and condition the surface for bonding.

The other options are incomplete or inappropriate as stand-alone steps: sanding alone misses cleaning and defect repair; patching without cleaning leaves contaminants that undermine adhesion; applying primer without cleaning skips the essential preparation that ensures the primer can bond effectively.