Owner sprayed them down last week. Also, impact guns work well on the ubolts. I only had one casualty. Small bolt that holds the front spring shackle to the car.
Too bad you are so far away. I'd even let you work on my cars if I couldn't do the work myself.
I know sooner or later that intermittent drivetrain squeal I hear in the C5Z is going to mean pulling out the drivetrain again. But I'm going to wait until something actually breaks first.