There’s genp community (which includes monkrus) in dbzer0. You should check it out.

I like this idea. Stick in a portable video player in the usb too. Then you got a working combo all together.

I would say give onlyoffice a try. It’s not FOSS but does have free tier for home use and it’s what I go to for non-main work computer. Beats libre imo.

My best answer at this point would be that you need to make your own program to find and remove by content. Because no other manual pdf editor would reasonably have such a feature since it’s so niche.

Also vibe coding with AI tends to be very good for singular tasks like this.

I wouldn’t recommend converting the pdf to anything else since that would remove the layer info unless it’s to more complicated formats like EPS, illustrator, etc.