How to Sand Wooden Doors for Painting & Refinishing (100, 150, 180, 220 Grit Guide)

Wooden doors collect fingerprints, scratches, and old paint layers over time. Sanding is the most effective way to restore them before applying a fresh coat of paint or stain. This guide explains the proper grit sequence and technique to make your doors look brand new.

Why Sanding Doors Matters

Sanding doors smooths out imperfections, removes old finish, and opens the wood grain for primer or stain. Without sanding, paint may peel and stain can appear blotchy.

Tools & Materials

• Orbital sander or sanding block
• Masking tape and drop cloths
• Vacuum and tack cloth
• Wood filler for cracks and dents
• Primer, paint, or stain

Best Grit Sequence for Doors

• 100 grit: Initial sanding to strip old finish and scratches.
• 150 grit: Leveling wood filler and smoothing patched areas.
• 180 grit: Refining the surface for even absorption.
• 220 grit: Final prep before primer, paint, or stain.

Step-by-Step: Sanding Wooden Doors

1. Remove the door. Take the door off hinges and lay flat on sawhorses for best results.
2. Start coarse. Use 100 grit (100-pack) to remove existing finish and rough areas.
3. Smooth repairs. Switch to 150 grit (50-pack) to level wood filler and patchwork.
4. Refine the surface. Use 180 grit (25-pack) for preparing bare wood.
5. Final sanding. Finish with 220 grit (100-pack) to achieve a smooth surface ready for finishing.
6. Clean and finish. Vacuum thoroughly and wipe with a tack cloth before painting or staining.

Special Cases

• Panel doors: Use sanding sponges to reach grooves and contours.
• Exterior doors: Apply weather-resistant primer and sealant after sanding.
• Veneer doors: Avoid aggressive grits (100); start at 150 to prevent sanding through the veneer.

Pro Tips

• Always sand with the grain to avoid cross scratches.
• Label hinges and hardware for easy reinstallation.
• Do not oversand edges—doors must fit frames properly.
• Work in a dust-free area before applying paint or stain.

Aftercare

• Allow finishes to cure fully before rehanging the door.
• Use gentle cleaners to avoid damaging the finish.
• Reapply clear coat every few years on stained doors for durability.

FAQs

• Do I need to sand if repainting? Yes, at least scuff sand with 180–220 grit for proper adhesion.
• Can I sand doors while still hanging? Possible, but removing them makes sanding faster and more even.
• What grit before primer? 220 grit gives the best surface for primer to bond.

Watch & Learn

Proper sanding ensures painted or stained doors look professional and last longer. Stock up on 100 to 220 grit sandpaper sheets for your next refinishing project. Explore the complete wood sanding collection today.