What precaution must be taken when sanding synthetic surfaces like plastic or melamine?

• A. Sand delicately to avoid damaging the fragile synthetic surface
• B. Sand aggressively to remove coatings
• C. Use a power sander to speed up the work
• D. Dampen the surface heavily before sanding

Answer: (A)

When sanding synthetic surfaces like plastic or melamine, the precaution is to apply very light pressure and use gentle, controlled strokes with fine-grit paper. These surfaces are relatively soft and heat from sanding can melt or scratch them easily, so a delicate touch helps prevent damage. Aggressive sanding or using a power sander increases heat and the chance of gouges, so they’re not appropriate here. Damping the surface heavily isn’t recommended either, as too much moisture can cause swelling or water damage to the substrate. A careful, light-sand approach with a fine grit keeps the finish intact and ready for the next step.