How to Sand Painted Wood for Repainting (80, 120, 180, 240 Grit Guide)

Repainting wood requires more than just applying a fresh coat of paint—proper sanding is the foundation for lasting, professional results. Sanding removes gloss, smooths imperfections, and helps new paint bond securely. This guide explains how to sand painted wood step by step using 80, 120, 180, and 240 grit sandpaper.

Why Sanding Painted Wood Matters

Old paint often peels, chips, or develops brush marks. Without sanding, new paint may not adhere properly and could peel prematurely. Sanding also smooths dents and scratches, ensuring a flawless surface for priming and painting.

Tools You’ll Need

• 80–240 grit sandpaper – from coarse stripping to fine finishing.
• Orbital sander – speeds up sanding on flat panels.
• Sanding block or sponge – for edges, corners, and trim.
• Dust mask & goggles – paint dust can be hazardous.
• Tack cloth & vacuum – essential for cleaning between steps.

Best Grit Sequence for Painted Wood

• 80 grit: Removes peeling paint and rough spots.
• 120 grit: Smooths surface after coarse sanding.
• 180 grit: Refines surface before priming.
• 240 grit: Creates a smooth, paint-ready finish.

Step-by-Step Process

1. Start with 80 grit. Strip peeling or thick paint layers using 80 grit (50-pack).
2. Move to 120 grit. Smooth the wood surface with 120 grit (25-pack).
3. Refine with 180 grit. Prepare for primer using 180 grit (25-pack).
4. Finish with 240 grit. Create a silky, finish-ready surface with 240 grit (100-pack).
5. Clean thoroughly. Vacuum and wipe with tack cloth before priming and painting.

Special Cases

For lead-based paint, avoid dry sanding—use chemical strippers or wet sanding with proper safety gear. For veneered surfaces, do not sand below 120 grit to prevent damage. On furniture, hand sand moldings and detailed carvings for precision.

Pro Tips

• Sand with the grain of the wood to prevent visible scratches.
• Always test primer on a small area before painting the entire surface.
• Replace sandpaper often—paint dust clogs sheets quickly.
• Seal with primer immediately after sanding for best adhesion.

Aftercare

• Inspect surfaces periodically—touch up scratches with fine sanding and fresh paint.
• Use gentle cleaners to preserve painted wood finishes.
• Store sandpaper in a dry place to extend its lifespan.

FAQs

• Can I paint without sanding? Not recommended—paint may not adhere properly.
• What grit should I stop at before primer? 180–240 grit works best for primer adhesion.
• Do I need to remove all old paint? Only loose or peeling paint—sound paint can be scuffed with 120–180 grit.

Watch & Learn

For repainting projects, shop our wood sanding collection.