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Achieving a flawless finish on epoxy resin projects relies heavily on careful sanding with the right progression of grits. Using assorted grit sanding discs is essential for preparing surfaces prior to a new resin pour or before polishing to a high shine.
How Does Grit Progression Improve Results?
Each stage in sanding—starting from coarse grits like p80 and moving through to fine options such as p600—serves a specific purpose. Coarse grits rapidly remove surface imperfections, bubbles, and high spots, while medium and finer grits refine the texture, gradually eliminating visible scratches. This stepwise approach ensures your surface is flat and ready for coating or polishing, minimising defects and reducing the risk of marks showing through subsequent layers of resin.
Guidance for Effective Sanding
Begin sanding with the lowest grit suitable for your project, and never skip intermediate grits. Use even pressure and keep the discs flat to avoid gouging. For epoxy resin, dry sanding discs such as those in our Dry Sanding Discs Kit are ideal for progressive smoothing. Once scratches from one grit are erased by the next, proceed in stages up to your desired finish.
When Does Using Multiple Grits Matter Most?
If you’re repairing a resin surface, removing casting lines, or preparing for a new pour, progressing through assorted grits becomes especially important. Proper grit selection helps to avoid accidental surface unevenness or visible sanding marks—crucial for clear finishes and professional-level results.
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Taking care to sand with assorted grits lays the foundation for stunning, bubble-free epoxy resin work. Mastering this technique supports every stage of surface repair or preparation—refer to our full guide on repairing or preparing for a new epoxy pour to ensure your next project is a success.