In order to remove orange peel, settled debris, runs, and other defects, more blocking is necessary. This time 3M 600-grit wet/dry paper is used with a soft sponge block and clean water. At this point, the underlying finish is straight and even, all that's left is to create a smooth and sleek topcoat. For that reason I switched to the soft sponge. It's aggressive enough to cut down blemishes, waviness, and orange peel; yet it's mild enough to not flatspot radiuses. However, continue to sand through curves, radiuses, and the like to keep consistency. When sanding you'll notice the clear will leave behind a white film. Be sure to clean each finished area immediately because this film can eat into the fresh paint.