I live near a large colony of crows/rooks and my car is unfortunately under their flight path. My whole car is covered in white splatter marks. Looks like someone has chucked white paint at it

There is so much of it that i have to rinse the whole car only to find that it is in the same state just a few hours later

I have noticed that the paint is marked where the b****rs have crapped on it. Infact its got so bad that i'm going to have to park my car well away from the house

. Probably for at least 2 months until they have finished nesting
So i have 3 questions
1. Am i allowed to shoot the buggers.
2. Whats the best way to get rid of the marks - not the actual poo but where the paint has been damaged. There are hundreds of tiny marks as well as the large splodges. Some sort of polish?
3. Is there anything i can apply to my paintwork to help protect it from future damage by corrosive s**t. My car has been treated with Supagard but it doesn't seem to give any protection
