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How to Sand and Polish Cured Epoxy Resin
How to Sand and Polish Cured Epoxy Resin
Sanding and polishing epoxy resin is essential for achieving a professional, glass-like finish. Here are the steps and tips to do it effectively:
Allow Full Cure: Ensure the resin has fully cured (typically 7 days) before sanding or polishing.
Wet Sanding Technique:
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Start with coarse grit (e.g. 400 grit) and gradually work up to finer grits (600, 800, 1000, 1500, 2000).
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Use water to lubricate the sanding process—this reduces heat and removes debris.
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Sand in circular motions and rinse between grits.
Polishing:
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Use a polishing compound specifically designed for plastics or resins.
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Apply with a microfiber cloth or a buffing pad using a rotary tool or polishing machine.
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Finish with a clean cloth to remove any residue and enhance the shine.
Tips:
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Always sand on a flat surface to avoid uneven pressure.
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For deep scratches, start with lower grit (e.g. 240–320).
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Avoid waxes or coatings not designed for epoxy, as they can yellow over time.
