Yes
You will have to be quick to remove bird droppings & tree sap alike.
The lime & natural acids present in both are killers for paint & quickly burn through or discolour.
detailing clay is a great idea as its not to aggressive when watered down with spittle etc.
I tend to use a cutting compund on my finger tips to try & skim off the damage which should reduce the chance of removing too much material.
Remember that you are removing the clearcoat & you do not want to break through in to the colour coat.
A couple of local repairs I have undertaken could not be completely removed on my roof panel so I had to blow in some localised clear coat & feather it out & polish it back to lose the damage but at certain viewing angles you can just see the repair.
Farrell