Edit : So I learned that you can right click the harvest icon to blacklist stuff, but I would still love to see a recycling plant of some kind so it's all not just wasted.
I'm thinking either a way to blacklist a certain resource from being picked up by a ship, or what I think would be more interesting something like a recycling plant that transforms it into scrap metal you can either sell (Like 20 ammo=1 scrap metal, because the main thing keeping me from selling all that excess really is just the capacity of stations) or reprocess into stuff like steel plates or coils. Or a different kind of ammo. Kinda like Astroneer does it, I guess?