Which steps are involved in underwater hull painting and coating preparation?

• A. Clean submerged area, but skip roughening and apply coating immediately.
• B. Roughen the surface, then apply antifouling only.
• C. Apply CP and then ignore surface preparation.
• D. Clean submerged area, remove biofouling if needed, roughen the surface, apply CP if needed, apply suitable underwater coating systems or antifouling.

Answer: (D)