What is the best method for applying a top coat over gel stain to achieve a professional finish?

The best method for applying a top coat over gel stain to achieve a professional finish is to first ensure the gel stain is completely dry, then lightly sand the surface with fine-grit sandpaper. Next, apply a thin, even layer of top coat using a high-quality brush or foam applicator, following the wood grain. Allow the top coat to dry completely between coats, and apply multiple thin coats for a smooth and durable finish.