Bird droppings contain quite a bit of acid, which is powerful enough to eat through a protective barrier of wax or sealant and begin to etch your cars paint. There are generally 2 types of damage caused by bird droppings. The topical stained etching is usually shallow enough and can be completely removed or at least greatly improved. The other type of damage is wrinkled etchings and too deep to repair. It looks similar to a small area of spider webs within the area that the bird dropping was. The GOOD NEWS is we can fix the topical etching THE BAD NEWS is we can’t fix the wrinkled etchings.