How to Sand Wooden Baseboards for a Smooth Finish (100–320 Grit)

Baseboards frame every room, but they take a lot of abuse—scuff marks, dents, and chipped paint are common. Sanding is the key to restoring baseboards before repainting or refinishing.

Why Sand Baseboards?

Sanding smooths out dents and scratches, removes chipped paint, and ensures new paint adheres evenly. It also prevents peeling and gives baseboards a crisp, professional appearance.

Tools You’ll Need

• Sanding sponges for profiles and corners
• Detail sander for narrow edges
• Wet/dry sandpaper sheets (100–320 grit)
• Vacuum and tack cloth
• Mask, goggles, and gloves

Recommended Grit Sequence

• 100 grit: Removing chipped paint and rough areas.
• 150 grit: Smoothing surfaces after initial sanding.
• 220 grit: Preparing baseboards for primer or paint.
• 320 grit: Final sanding for a polished surface.

Step-by-Step Process

1. Clean the baseboards. Wipe away dirt, dust, and grease.
2. Start with 100 grit. Use 100 grit (100-pack) to remove rough spots and peeling paint.
3. Refine with 150 grit. Smooth profiles and flat surfaces using 150 grit (25-pack) sheets.
4. Prep with 220 grit. Sand evenly with 220 grit (50-pack) before applying primer.
5. Finish with 320 grit. Use 320 grit (25-pack) for smooth results before painting.
6. Clean thoroughly. Vacuum and wipe with tack cloths.
7. Apply finish. Prime, then paint or stain for a refreshed look.

Special Cases

For MDF baseboards, avoid coarse grits like 100 on edges—start at 150 grit to prevent chipping. For heavily painted baseboards, stripping followed by sanding may be necessary.

Pro Tips

• Sand with the profile to avoid flat spots on molding.
• Use sponge blocks for curved or decorative sections.
• Apply caulk after sanding to fill gaps before painting.
• Work in small sections for consistency.

Aftercare

• Wipe baseboards regularly to maintain appearance.
• Touch up paint as needed in high-traffic areas.
• Repaint every 3–5 years for best results.

FAQs

• Do I need to sand to bare wood? No—scuff sanding is usually enough for repainting.
• Can I sand by hand? Yes—hand sanding is best for profiles and corners.
• What grit is best before painting? 220 grit provides ideal adhesion and smoothness.

Watch & Learn

Sanding baseboards improves both appearance and durability. Stock up on medium grits, fine sheets, and super fine sandpapers to complete your next baseboard refinishing project.