AO Silver Member
Join Date: Mar 2003
Re: Do Bird Droppings damage your Paint?
All of the car manufacturers (and the two main paint suppliers) have test specifications for paint damage due to environmental factors which includes bird droppings. It also includes things likes engine oil, washer fliud, brake fliud, diesel, petrol, or anything that could normally find its way onto the bodywork.
The specification calls for it to be applied to the surface for a set time period (say four hours) at 20 degrees centigrade before being washed-off. Then tests for colour and gloss are made. The problem is that bird droppings are very different depending on what the bird has eaten so a formula simulating it is used which itself is quite aggressive. I've been responsible for doing this testing in the past on new car components.
So yes, if you leave it on for longer than a few hours and depending on the temperature, it can definitely damage your paintwork.
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