you don't really want the insurance to sort it if you can get away with just washing it off

but if it is an insurance job, at least you've got 5o on the case

as said before, i'd try a small inconspicuous area to get the paint off first, and see what happens with that

elbow grease might be hassle but it won't cost you your excess

don't forget you've got several other peole in ovled in this so the police will at least be trying to solve it