How can I achieve a professional finish on a live edge slab during the finishing process?

To achieve a professional finish on a live edge slab during the finishing process, start by sanding the surface to remove any rough spots. Apply a wood conditioner to even out the wood's absorption of stain or finish. Next, choose a high-quality finish such as polyurethane or epoxy resin and apply it evenly with a brush or cloth. Allow the finish to dry completely between coats, and sand lightly between each coat for a smooth and glossy finish.