So far this has only happen twice in two weeks but on both occaisions after removing the bird dropping, the paint is left with an etch mark. On both occaisions I have had to use Auto Glym Super Resin polish to remove the mark and then top up with some carnuba wax (as SRP has little long term protection). Has anyone else experienced this (think it must be more noticeable on darker colours - mine is Lava Grey)?