Sanding Wood Trim and Baseboards: Smooth Edges for Painting (80–220 Grit Guide)

Wood trim and baseboards add detail to your home, but scuffs, dents, and rough edges can ruin their appearance. Proper sanding ensures a flawless surface for paint or stain, making your trim look sharp and professional. This guide explains the grit sequence and steps for perfect results.

Why Sand Trim Before Painting?

Trim and baseboards often accumulate dings, old paint layers, and uneven edges. Sanding removes imperfections and creates a smooth surface for coatings to adhere properly.

Best Tools for Trim Sanding

• 9x11 in silicon carbide sandpaper sheets
• Sanding sponge or block
• Vacuum with brush attachment
• Tack cloth
• Dust mask or respirator

Recommended Grit Sequence

• 80 grit: Remove thick paint or rough edges.
• 120 grit: Smooth surfaces after coarse sanding.
• 180 grit: Prepare bare wood for primer.
• 220 grit: Final sanding before painting or staining.

Step-by-Step: Sanding Trim & Baseboards

1. Prep the area. Remove dust and cover floors with drop cloths.
2. Start with 80 grit. Strip old paint or level damaged areas. Use 80 Grit (25-pack).
3. Smooth with 120 grit. Eliminate scratches from coarse sanding. Try 120 Grit (50-pack).
4. Refine with 180 grit. Sand with the grain for clean edges. Stock up on 180 Grit (100-pack).
5. Finish with 220 grit. Light passes create a smooth surface ready for paint.
6. Clean up. Vacuum and wipe with a tack cloth before priming.
7. Prime & paint. Apply primer, then paint or stain in thin coats for best results.

Special Cases

For detailed trim with grooves, fold sandpaper to reach tight spaces or use sanding sponges.

Pro Tips

• Always sand with the grain to prevent scratches.
• Don’t oversand edges—keep them crisp and sharp.
• Replace sandpaper as soon as it clogs for cleaner sanding.
• Work under good lighting to catch flaws before painting.

Aftercare

• Allow paint to cure fully before cleaning trim.
• Wipe with a damp cloth instead of harsh cleaners.
• Touch up dings promptly to maintain a fresh look.

FAQs

• Can I paint trim without sanding? It’s possible, but sanding ensures adhesion and a smoother finish.
• What grit is best for in-between coats? Use 220 grit for light sanding between coats of paint.
• Do I need a power sander? Not usually—hand sanding with blocks or sponges gives better control for trim.

Watch & Learn

For smooth, professional-looking trim, explore our Wood Sanding Collection.