Sanding Plywood: Grit Guide for Smooth, Splinter-Free Surfaces

Plywood is a versatile material for cabinets, shelving, and DIY projects, but its layered construction and thin veneer require careful sanding. Done correctly, sanding plywood eliminates splinters, smooths the surface, and prepares it for paint or finish without damaging the top layer. This guide explains the grit sequence and process for sanding plywood safely.

Why Sand Plywood?

Sanding removes rough edges, mill marks, and surface glue while preventing blotchy finishes. Without sanding, plywood may absorb stain unevenly or leave sharp splinters exposed.

Tools You’ll Need

• Sandpaper sheets in multiple grits
• Sanding block or orbital sander
• Vacuum and tack cloth
• Protective gear (mask, safety glasses)

Best Grit Sequence for Plywood

• 120 grit: First pass for smoothing rough veneer.
• 180 grit: Refines scratches and evens the surface.
• 220 grit: Final sanding before painting or staining.

Step-by-Step: Sanding Plywood

1. Prep the sheet. Inspect plywood for defects and fill gaps with wood filler if needed.
2. First sanding pass. Use 120 grit (25-pack) to smooth rough veneer and edges.
3. Smooth with 180 grit. Switch to 180 grit (100-pack) for consistent surface texture.
4. Final sanding. Apply 220 grit (25-pack) to prep for finish.
5. Clean thoroughly. Vacuum and wipe dust with a tack cloth.
6. Apply finish. Use primer, paint, or clear sealer depending on your project.

Special Cases

For thin veneers, avoid sanding with anything coarser than 120 grit to prevent burn-through. For plywood edges, sanding may expose layers—seal edges with filler or edge banding before finishing.

Pro Tips

• Always sand with the grain to protect the veneer layer.
• Use light pressure—let the grit do the work.
• Test finish on a scrap piece of plywood to check absorption.

Aftercare

• Seal plywood with polyurethane, paint, or laminate for durability.
• Clean with mild soap and water—avoid abrasives that scratch finishes.
• Lightly sand with 220 grit before refinishing in the future.

FAQs

• Can I sand plywood edges smooth? Yes, but seal them afterward to prevent splintering.
• Do I need to sand plywood before painting? Always—sanding ensures primer and paint adhere properly.
• What if I sand through the veneer? Fill lightly with wood filler, but avoid over-sanding in the future.

Watch & Learn

Sanding plywood properly ensures smooth, splinter-free surfaces that finish beautifully. Stock up on 120 to 220 grit sandpaper sheets to prepare your plywood projects with confidence.