I park under a huge old walnut tree and this year seems to be particularly good for walnuts, which the birds and squirrels eat while perched over the cars. They then use the same perches as a toilet and having to clean the cars every day has become rather tiresome. The garage is full of "stuff" so that's not really an option. It's a double-wide drive so a normal car porch would be difficult (has anyone succeeded with a cantilevered car porch?)
I don't really want to resort to car covers because I can't see me using them every time. Any suggestions of how to dissuade the critters or shield the cars?
Help!