File Uploads collection granular access control?

[BraianPita]

I was wondering how exactly does the access control for uploads in collections work. I understand that you can control access to uploads through the collection access. However, I also know there is field level access control, so I was wondering if its possible to allow access to a collections 'title' and 'description', but not the file itself. I want to make sure that even if you have the url for the upload, you won't be able to retrieve it. I only want users to be able to see all the other fields. The reason for this is because I want to restrict access to the files themselves based on a purchase, and possibly have a modified 'preview' (For example, an audio file that when accessed through a custom endpoint will only return the first 5 seconds for a preview). But I am unsure of how field level access controls work for uploads.