How to Sand Wood Trim to Sand Between Varnish Coats

For wood trim sanding with the goal to sand between varnish coats, a consistent grit plan prevents rework. These silicon carbide sheets support wet or dry use, so you can wet sand for dust control and cleaner cutting when needed.

Why Sanding Matters

Sanding removes high spots and sets the scratch depth your finish will reveal. A proper grit progression replaces the previous scratches step by step, which is what makes the surface look uniform.

Tools

• Sanding block (flat areas)
• Foam hand pad (curves/contours)
• Vacuum or brush
• Microfiber cloth
• Optional: spray bottle + water for wet sanding

Recommended Grit Sequence

• 220 grit
• 320 grit
• 400 grit
• 500 grit

Step-by-Step

1. Clean first. Remove residue so the abrasive cuts evenly.
2. Level and blend. Start with 220 Grit (10) to remove highs and smooth transitions.
3. Refine scratches. Move to 320 Grit (10) until the previous grit marks are gone.
4. Final smoothing. Use 400 Grit (10) for a uniform surface ready for the next step.
5. Inspect under angled light. Catch deep lines now before coating.
6. Final cleanup. Vacuum and wipe (and dry fully if wet sanded).

Special Cases

Edges: Feather with lighter pressure to avoid rounding.
Clogging: Wet sanding helps reduce loading; wipe slurry often and rinse sheets.
Between coats: Use the finest grit and sand only until sheen is evenly dulled.

Pro Tips

• Overlap passes to avoid striping and dull patches.
• Change direction slightly with each grit to spot missed scratches.
• Use a block on flats to prevent finger grooves.
• Replace sheets when cutting slows; worn abrasive can burnish.

Aftercare

• Remove all dust before finishing to avoid defects.
• Store sheets flat and dry.
• If wet sanding, let the surface dry completely before primer/paint.

FAQs

• Can I use these wet? Yes—silicon carbide sheets are designed for wet or dry use.
• When do I move up a grit? When the scratch pattern is uniform and the previous grit scratches are gone.
• Should I press harder to go faster? No—extra pressure often causes uneven low spots and deeper scratches.

Watch & Learn

Watch for consistent overlap and surface checks between grits—those two habits prevent surprises at the final finish stage.

For consistent results, follow the sequence and keep pressure light—start with 220 Grit (10) and work upward to a smoother finish.