Brassicas have worked for me just broadcasted by hand spreader into standing beans. So spraying it and getting it cultipacked will definitely work out well. The seeds are so small the just find a hole and grow. If you can drag something over the top quick and then cultipack.. thats even better.
Im a huge believer in cultipackers or using an atv lawn roller.. They pop up in days rather than weeks. Baby smooth fields for driving. Get the most germ out of the seeds.