WaterfowlMD

(See end for main question) As I was having the amazing experience of curtain box waterfowl hunting, I was simultaneously watching the rain and ocean add an orange film to my barrel right before my eyes. After the hunt, and before leaving the dock, I field stripped it and wiped down all surfaces dry. I then applied a layer of hoope gun oil and laid it in the back seat to keep it out of the humidity. When I got home I again tried cleaning it with the oil, a tooth brush, and a rag. I then left it with a coat of oil overnight . For context I am extremely diligent about cleaning my gun after each hunt (brand new as of October). After each hunt I wipe down the firearm and then after it dries, I apply a layer of hoope gun oil with an rag. **The issue is*** there are still streaks of rust that I can't get off and I have no idea what else to do?? I want to get the rust off and make sure I protect it properly. And suggestions???? (edited picture attached for visual) IMG_2111.pdf Thanks in advance!

As a follow up, is it okay to store the gun with the barrel off? This could allow me to get a smaller case

Good suggestions on a case that actually fits the Super Nova w/ 28" barrel? The 49.5" overall length is making it difficult to find a single gun case that long

Does anyone have any suggestions for a hard case for a 28" barrel SuperNova that won't break the bank? The 49.5" overall length is making it difficult to find a hard case.