This question is actually for my husband. We have a tree that hangs over into our driveway which he has to park under. I used to but didn't want to ruin my car so I make him park under it and me behind him. Well something has been falling from it and has ruined his Paint. He has what looks like brown specks all in his paint that regular car washing won't get rid of. Is there anything I can use on it to get his paint back to the way it was before? His truck is a goldish color. Thanks for any advice/suggestions.