Sounds you might have some high spots that were not wiped off completely. If the coating has cured for more than 12 hours, then most likely you will need to use a machine polisher to polish off the coating and reapply it.
Here is a helpful article from IGL coatings about how to avoid rainbow-like high spots and what to do if they occur:
Learn how to avoid high spots in your ceramic coating. Discover why high spots occur and how to identify them!
blog.iglcoatings.com