Scratches in the paint, what to do?

Hello guys, I found a scratch of a little 4 cm in my passenger door at noon! I got annoyed with animals… and now I’m standing there and I don’t know anymore. The scratch might be about 24 hours old and bothers me of course. Of course, if it would disappear again, it wouldn’t be my favorite. What can I do now? Didn’t hear the paint pencil be so great… What else do I have? How does it look like with rust? Is the zinc layer damaged? Thank you very much.