Sanding eco resin (such as Eco Pour H20, Jesmonite, Ecopoxy, or other plant-based and water-based resins) is similar to sanding traditional resins, but there are a few important things to think about to keep the finish smooth and avoid damage. Here’s a step-by-step guide:

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🛠️ What You Need:

• Sandpaper (various grits: 120 → 240 → 400 → 800 → 1000+)
  We like this pack from Amazon as it comes with a large range of sandpaper and they can be cut to smaller pieces. They’re also suitable for wet and dry sanding.
• Sanding block
  You can get blocks pre-wrapped in sandpaper like these or you can create your own with a wooden block wrapped in sandpaper.
• Orbital sander (optional but great for larger projects) and dremel also works well for smaller pieces especially terrazzo projects that require a good amount of sanding.
• Water (for wet sanding) and a washing up bowl
• Respirator/dust mask (especially when dry sanding)
• Gloves and eye protection
• Clean cloth

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🔧 Steps to Sand Eco Resin:

1. Cure Completely

Make sure the eco resin is fully cured (typically 12–24 hours or per manufacturer’s instructions). Sanding too early can cause smearing or uneven surfaces.

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2. Start with Lower Grit (if needed)

• If the surface has rough edges or major imperfections, start with 120 or 180 grit sandpaper.
• Use a sanding block for flat surfaces to keep things even.
• Sand in a circular motion for curved or rounded pieces.

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3. Progressively Use Higher Grits

• Move to 240, 400, and eventually up to 1000–1500+ if you want a smooth, polished finish.
• Each stage removes the scratches from the previous grit.

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4. Wet Sanding (Recommended)

• Especially useful for eco resins, as it reduces dust and overheating.
• Dip sandpaper in water or keep the surface wet while sanding.
• Wet sanding with 400+ grit gives a cleaner, glossier finish.

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5. Clean Between Grits

• Rinse or wipe the surface clean before switching sandpaper grits.
• This prevents cross-contamination and deep scratches.

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⚠️ Tips & Warnings:

• Always sand in a well-ventilated area.
• Eco resins can be softer than epoxy—don’t apply too much pressure. Don’t sand too much or your piece will become thing and brittle.
• If using an electric sander, use light pressure to avoid gouging.

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