Regardless of the manufacturer it is vital that you clean bird droppings quickly. Once it has damaged the lacquer its respray time unfortunately but if its a small area I can see no reason why one of the smart repair people could not repair the patch rather than a whole panel.

Here's a tip I learned many years ago, place wet kitchen towel on the droppings as soon as is practical, it will soon soften and wipe off with no effort.

>>>>>that has etched the clear coat

The 'etching' is what catches the light and makes it look worse. Unless it has gone right through the clearcoat a professional with a machine polisher and the right cutting polish will take off some of the clear coat and flatten it down so it shouldn't be noticeable. VAG paint and lacquer is known to be hard and will take quite a bit of aggressive work with little or no risk to the paint. Properly waxed or glazed and you should be ok at a fraction of the price of a respray. You could phone around, if they're any good they'll have shelled out for an electronic paint thickness gauge with which they would assess the damage and then use to carefully monitor how much of the top clear coat they are removing without compromising protection of the underlying paint. I've seen it done and it is very impressive and effective work.