Sanding Marks

Problem Description:

Sanding marks are scratches that occur on furniture surfaces during the sanding process. These marks generally result from excessive pressure on the sandpaper, improper choice of sanding material, or incorrect sanding technique.

Possible Causes:

• Incorrect Sandpaper Selection: Using sandpaper that is either too coarse or too fine can leave visible marks on the surface.
• Excessive Pressure: Applying too much pressure while sanding can cause deep scratches.
• Lack of Alternating Movements: Sanding repeatedly in the same direction leads to pronounced scratches.
• Dirty Sandpaper: Sandpaper clogged with debris or resin lumps hinders smooth sanding and can cause scratching.

Solutions and Precautions:

• Choose the Appropriate Sandpaper: Use suitable grit sizes. For primer stages, 180-220 grit is recommended; for sanding before paint application, 320-400 grit should be preferred.
• Apply Even and Light Pressure: Sand gently to avoid deep marks on the surface.
• Use Alternating Sanding Motions: Changing direction during sanding reduces the visibility of scratches.
• Keep Sandpaper Clean: Ensure sandpaper is free from clogging and debris to maintain effective sanding.

Sanding marks can be prevented with the right sandpaper choice and careful sanding technique, ensuring a smooth surface finish.