Thanks Eric and Bill.
I spent the morning with Dr. Google learning about copper corrosion. Seems that there is a lot of chemistry involved and that the corrosion can be tough to knock out without aggressive cleaning.
I like the idea of painting the lines, but they first need to be cleaned better than I am able to do in that particular corner of the ER. I did clean off the loose blue flaky stuff and vacuum the area, but cannot get in there to wet clean and flush the lines. My concern with a non neutralizing paint is that the corrosion can continue, and I won't see it.
Corrosion X claims on their website that it can displace the salts that are causing the corrosion on the copper lines then protect th
em with a waxy film. What do you think about Corrosion X instead of paint? To me an "advantage" is that I can visually monitor the situation and if corrosion persists then replace the lines before they leak.
I think I will get a micrometer down there today and figure out the line size and see if I can get some "spare" tubing to have on hand just in case.