How can I clean bee droppings from my car paintwork?

I keep bees and have an ongoing problem of cleaning the bee droppings off the paintwork of my black (should have thought it through!) BMW X3. It's quite easy to pick off the dried up droppings with fingernails...

What car polish will give good protection through the winter months?

I have just purchased a new car which I have to keep outside on my drive. Can you recommend a car polish that will give it good protection through the winter months?

What polish or wax would you recommend?

I have a one-year-old Mercedes C200 in Celonite Grey paint. What polish or wax would you recommend?

Mercedes-Benz S-Class (2014 - 2020)

Supremely comfortable with an elegant yet modern interior., handles impressively well for such a big car, reasonable economy and emissions.