How to Sand Between Paint Coats for a Smooth Finish (320, 360, 400, 500 Grit Guide)

When painting wood, metal, or even walls, the difference between an average job and a professional-looking finish is sanding between coats. Each coat of paint leaves slight texture—brush strokes, roller marks, or dust nibs. Sanding between layers with the right grits ensures the next coat bonds smoothly and looks flawless. This guide explains how to sand between paint coats using 320, 360, 400, and 500 grit sandpaper.

Why Sand Between Paint Coats?

Even high-quality paint leaves imperfections after drying. Sanding evens out the surface, removes particles, and creates tiny scratches for better adhesion. Without this step, paint layers can look uneven and may peel or chip sooner.

Tools You’ll Need

• Fine sandpaper (320–500 grit) – wet/dry sheets are best for paint work.
• Sanding block or sponge – provides even pressure.
• Tack cloth or microfiber – removes fine sanding dust.
• Spray bottle with water – keeps finer grits from clogging.
• High-quality paint brush or roller – prevents excess texture in new coats.

Best Grits for Paint Prep

• 320 grit: Smooths brush strokes or roller marks from the first coat.
• 360 grit: Refines the surface for a consistent feel.
• 400 grit: Standard grit before applying final coats.
• 500 grit: Ultra-fine sanding for glossy, high-end finishes.

Step-by-Step Process

1. Start with 320 grit. Sand the dried first coat lightly to remove brush strokes. Use 320 grit (25-pack) for reliability.
2. Smooth with 360 grit. Lightly sand over surfaces before applying the second coat. Try 360 grit (50-pack) for consistent coverage.
3. Refine with 400 grit. Before the final paint coat, sand gently to eliminate small imperfections. Stock up with 400 grit (100-pack).
4. Finish with 500 grit. For glossy paints, a final sanding ensures the smoothest possible base. Use 500 grit (10-pack).
5. Clean thoroughly. Always wipe surfaces with tack cloth before applying the next coat.

Special Cases

For latex paint, sanding may only be needed between the first and second coats. For oil-based or enamel paints, sanding between every coat is essential. On cabinets or furniture, always finish with 500 grit for a factory-smooth look.

Pro Tips

• Don’t press hard—just scuff the surface lightly.
• Wet sanding reduces dust and improves smoothness for glossy finishes.
• Always wait until paint is fully dry before sanding to avoid clogging.
• Use even, overlapping strokes for consistency.

Aftercare

• Let the final coat cure fully before handling or cleaning.
• Protect finished surfaces with sealant or topcoat if needed.
• Maintain painted surfaces with gentle cleaners to avoid dulling the finish.

FAQs

• Do I really need to sand between coats? Yes—this step ensures better adhesion and smoother results.
• Can I use steel wool instead of sandpaper? Not recommended for paint—it can leave residue that interferes with adhesion.
• What grit should I use before the final coat? 400–500 grit works best for flawless results.

Watch & Learn

For professional paint finishes, explore the full fine grit sandpaper collection.