How to clean these pages?

No.12882881 ViewReplyOriginalReport
Hello /a/. I got this one shot shota x lolitrap h doujin. My problem is that these are all inside a PDF, and the scans are not all that clean. Being an utter newbie to cleaning, I was wondering if you could point me in the direction of a good cleaning technique, or better yet, for better scans, since i want to translate this.