From experience, you can’t polish out Matt paint or use t-cut, if bird droppings are not removed quickly this can cause problems. This paint is very difficult to match up so you need a very good paint shop for any damages so yes you may need entire panels resprayed. A friend had the front end and wings wrapped in clear 3m film especially to help with potential repairs it was expensive to do this but cheaper than fixing any deep stone chips.
Personally I don’t think it’s worth the hassle.