A smoother surface not only looks better but often indicates a better mold-making process, leading to better fatigue resistance.
Once fully cured (usually 3 to 7 days depending on the brand), the piece must be leveled. Because wood and resin have vastly different densities, passing the piece through a standard industrial planer can cause the resin to chip or shatter. Instead, utilize a CNC machine or a manual router sled setup equipped with a sharp carbide-tipped flattening bit to achieve a perfectly uniform surface. Progressive Sanding Schedule casting woodman high quality