How to Sand Wooden Blinds Before Painting or Staining: Smooth, Even Finish (150–320 Grit Guide)

Sanding wooden blinds before refinishing is essential for achieving a smooth, even finish. Proper sanding ensures better paint or stain adhesion and removes surface imperfections without damaging the slats.

Why Sand Wooden Blinds?

Over time, wooden blinds can accumulate dust, grime, and minor scratches. Sanding cleans the surface, evens out imperfections, and opens the wood grain for a better bond with paint or stain.

Tools & Materials

• Sanding sponges or sanding block
• Detail sander for flat areas
• Vacuum and tack cloth
• Wet/dry sandpaper sheets
• Dust mask, safety glasses

Recommended Grit Sequence

• 150 grit: Removing old finish and smoothing surfaces.
• 220 grit: Refining for a more even texture.
• 320 grit: Final sanding before paint or stain application.

Step-by-Step: Sanding Wooden Blinds

1. Remove the blinds. Take them down and lay them flat on a clean surface.
2. Initial sanding. Use 150 grit (25-pack) to remove any old finish and smooth rough areas.
3. Refining. Switch to 220 grit (100-pack) for an even, consistent texture across each slat.
4. Final sanding. Lightly go over with 320 grit (25-pack) to prepare for finish application.
5. Clean thoroughly. Vacuum and wipe down with a tack cloth to remove dust.
6. Apply finish. Paint, stain, or seal according to your design choice, sanding lightly between coats if needed.

Special Cases

For blinds with intricate detailing or grooves, fold sandpaper or use sanding sponges to reach all areas without rounding edges.

Pro Tips

• Work gently to avoid breaking thin slats.
• Sand with the grain to minimize visible scratches.
• Use light pressure—let the sandpaper do the work.

Aftercare

• Dust blinds regularly to maintain the finish.
• Reapply finish as needed if exposed to sunlight or moisture over time.

FAQs

• Do I need to completely remove the old finish? Only if it’s peeling or damaged—otherwise, sanding smooth is often enough.
• Can I sand blinds without removing them? It’s possible but less effective—removal allows for more thorough sanding.

Watch & Learn

For smooth, evenly finished blinds, stock up on the right grits. Shop all wet/dry sandpaper sheets today.