Sanding Resin Casting Molds: 400–1500 Grit Sandpaper Sheets

Resin casting molds often leave edges, seams, or cloudy spots on finished pieces. To achieve a professional finish, you’ll need the right 9x11 inch sandpaper sheets. eQualle’s wet dry silicon carbide sandpaper sheets allow you to refine resin surfaces step by step until they’re smooth and clear.

Why Sand Resin Castings?

Resin jewelry, figurines, and decorative pieces can come out with rough edges or surface imperfections. Sanding removes casting marks, smooths uneven areas, and prepares the surface for polishing. Without sanding, resin remains dull or cloudy.

Tools You’ll Need

• eQualle fine sandpaper sheets
• Sanding block or foam pad
• Spray bottle with water
• Microfiber towels
• Polishing compound

Best Grit Sequence for Resin Castings

• 400 grit — Smooths sharp mold lines. 400 Grit (25-pack).
• 800 grit — Refines scratches from coarse sanding. 800 Grit (25-pack).
• 1200 grit — Improves clarity and removes haze. 1200 Grit (25-pack).
• 1500 grit — Prepares resin for polishing. 1500 Grit (25-pack).

Step-by-Step Resin Sanding

1. Begin with 400 grit sandpaper sheets. Wet sand sharp mold seams and edges until smooth.
2. Switch to 800 grit. Sand in circles to refine scratches and start revealing clarity.
3. Move to 1200 grit sandpaper sheets. Continue wet sanding until the resin surface looks evenly frosted.
4. Finish with 1500 grit. Lightly sand to prepare the piece for final polishing.
5. Polish. Use resin-safe polishing compound to achieve a glass-like shine.

Special Cases

For thick casting ridges, start with 220 grit before moving into the 400–1500 sequence. For clear jewelry, never skip grits to avoid cloudy streaks.

Pro Tips

• Always wet sand resin to prevent melting or clogging sheets.
• Sand in alternating directions with each grit for complete scratch removal.
• Use sandpaper sheets that don’t clog with dust for smoother results.

Aftercare

• Wipe finished pieces with a microfiber cloth to maintain shine.
• Store leftover sheets flat and organized by grit.
• Keep assorted grits handy for future resin projects.

FAQs

• Do I need to polish after 1500 grit? Yes—sanding only creates a matte finish. Polishing restores gloss.
• Can I dry sand resin? Not recommended—heat buildup can damage the surface.
• Which pack should I buy? A 1200 Grit (25-pack) is essential for refining clarity.

Watch & Learn

Get crystal-clear resin finishes with eQualle 9x11 in sandpaper sheets. Shop the complete selection in the Fine Sandpaper Collection.