Subaru Impreza 2006: Bird droppings leave their mark

IF YOU want to buy a car with long-lasting paint, then don't buy a Subaru Impreza. I was recently told by a Subaru dealer that the bird-dropping marks on my 2006 model car are not their issue but mine. The bird droppings were on the car for no more than a weekend, but I was told bird droppings could mark the paint within 12 hours. If that's the case, I shouldn't park my car anywhere for more than 12 hours, even my driveway overnight. This is no ordinary mark: it actually ate into my paint and has two marks where you can see the metal underneath. If this is a drawback of water-based paint, then Subaru will need to do some serious testing on an alternative.