Sanding Between Coats

What happens here

After the initial coat, the doors are sanded to address any remaining imperfections. The painter uses a block sander with a 320-grit film tech sanding paper for a fine, flat finish. He emphasizes sanding lightly and moving the sander quickly to avoid overheating the paint and causing it to load up the sandpaper. He also mentions using a dry brush to remove sanding dust.

Goal: Achieve a smooth surface for the final coat of paint.