Sand resin 3D printed figurine to smooth support marks without los...

Wet sanding can help reduce loading at finer grits and keep scratches consistent. This workflow sands a resin 3D printed figurine to smooth support marks without losing detail through 600–2000 grit with a simple wet/dry option.

Dry to cut faster early, wet to refine later.

Why Sanding Matters

Sanding removes defects and creates the surface profile for the next stage. Deep scratches left behind can show through after paint, clear coat, or polishing. A controlled progression makes finishing predictable.

Recommended Tools

• Sandpaper sheets
• Sanding block/pad
• Spray bottle with clean water (for wet sanding)
• Microfiber cloths
• Rinse water (optional)
• Masking tape

Recommended Grit Sequence

Use the sequence below in order. Inspect between steps and only move up when older scratches are removed.

• 600 grit: dry early, wet at finer steps to reduce loading.
• 800 grit: dry early, wet at finer steps to reduce loading.
• 1000 grit: dry early, wet at finer steps to reduce loading.
• 1500 grit: dry early, wet at finer steps to reduce loading.
• 2000 grit: dry early, wet at finer steps to reduce loading.

Step-by-Step

1. Protect adjacent areas. Tape trim, edges, and nearby surfaces you don’t want to scuff.
2. Clean first. Remove oils and dust so the paper cuts evenly.
3. Start with 600 grit. Use even strokes and a block where possible to avoid waves.
4. Wipe and inspect. Confirm one consistent scratch pattern before moving up.
5. Step up through 800 and 1000 grit. Slightly change direction between grits and reduce pressure.
6. Refine with 1500 grit. Keep motion steady; avoid sanding in one spot.
7. Finish with 2000 grit. This sets your final surface profile for smooth support marks without losing detail.
8. Wet-sand fine steps. Mist with clean water and rinse the paper often to reduce loading.
9. Final cleanup. Vacuum/brush, then wipe with a clean cloth before the next stage.

Special Cases

If a deep scratch appears late, drop back one grit step and remove it before continuing.

Pro Tips

• Swap sheets when they stop cutting; clogged paper can leave random scratches.
• Reduce pressure as grits get finer.
• Wipe between grits so inspection is accurate.
• Use a block on flats to avoid finger grooves.

Aftercare

• Remove dust from seams and corners before coating.
• If wet sanded, dry fully before primer/paint/clear coat.
• Store unused sheets flat and dry.
• Discard heavily loaded sheets so old finish doesn’t re-scratch the surface.

FAQs

• Can I skip a grit? Skipping often leaves deeper scratches that show later. Use the sequence for predictable results.
• How do I know when to move up? When the scratch pattern is uniform and you can’t find lines from the previous grit under angled light.
• Why does the finish still look uneven? Usually because the first grit step wasn’t completed or debris re-scratched the surface.
• Do I have to wet sand? No. Wet sanding helps at fine grits, but completing each grit step matters more than wet vs dry.

Watch & Learn

Here are the exact grits referenced in this workflow so you can match the sequence: 280 grit (pack of 100), 2000 grit (pack of 50), 2000 grit (pack of 100).

• 280 Grit Sandpaper Sheets — Pack of 100
• 2000 Grit Sandpaper Sheets — Pack of 50
• 2000 Grit Sandpaper Sheets — Pack of 100

Complete each grit step, inspect under angled light, and keep pressure light at the end. That’s the simplest route to a finish-ready surface.