How do I create an ultra smooth finish with Mod Podge Hard Coat?

For an ultra smooth surface, apply 4 to 5 coats of Mod Podge Hard Coat. When applying the coats, brush in one direction then the other and let dry between coats. Wet sand with #400 sandpaper and water. Sand finish lightly until ridges are flat and smooth. Wipe dry. If desired add an additional coat of Hard Coat Mod Podge.