Which statement about wet sanding on gypsum panels is correct?

• A. It eliminates dust and prevents scuffing of the drywall surface paper.
• B. It increases moisture absorption.
• C. It seals the surface preventing paint adhesion.
• D. It speeds up curing.

Answer: (A)

Wet sanding on gypsum panels is about controlling dust and protecting the surface during finishing. Keeping the area damp makes sanding dust stay with the surface water instead of flying around, which makes cleanup easier and reduces inhalation exposure. The moisture also cushions the surface, so the sanding tool is less likely to scuff or damage the drywall paper. That combination of less dust and gentler surface contact is the main benefit, which is why this approach is correct. Increasing moisture absorption isn’t the goal and can cause problems if the board soaks up too much water. Wet sanding doesn’t seal the surface or speed curing, so those effects aren’t what this technique aims for.