How to Finish Corian Countertops

Mark the damaged area with the grease pencil. Make a small circle around the deepest part of the scratch, gouge or burn. Then make a larger circle around that circle, and then a still larger circle around that one. The circles guide sanding repairs and then serve to mark the areas to blend the repairs with the rest of the surface.

Start sanding with the 120-grit sandpaper, inside the smallest circle, to focus on the damaged area. Work in a circular motion and apply light, steady pressure. Sand slowly and carefully, to avoid removing more of the Corian surface than necessary. Apply extra pressure – very carefully – if needed to remove the damage completely.

Switch to the finer 150-grit sandpaper when the original damage is no longer visible. Now you’ll begin to “feather” or gently smooth and blend the repaired area into the surrounding surface, so the repair will be virtually invisible. Sand lightly over the repair area – the inside circle – and throughout the second circle, applying light, steady pressure and continuing to work in a circular motion.

Change to the very fine 280-grit sandpaper for final refinishing. Lightly apply the sandpaper within all three circles to smooth out or blend between levels, working in a circular motion. Finally, sand the entire counter surface, to achieve uniform color and texture.

Spray the surface with water and do a final sanding and polishing while the surface is wet. Apply more water and wipe down the surface – removing all sanding dust and moisture – until it is completely clean and dry.