If you're new and would like to start a new scanlation team, I randomly found a website while searching for something in google the other day that has a thorough list of guides for how to clean manga in photoshop.
Here's the link = https://www.insidescanlation.com/etc/how-to-edit-manga-with-photoshop/rawr/editguide/index-2.html
Good luck~
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