Oh my... I have a couple of MC30s to restore. I don't know when I'll get the opportunity to dive into this. But looking in on them, I was appalled at the extent to which they had degraded. I live in a relatively humid region and my first concern is to clean up the exteriors and take whatever steps I can to prevent them from declining further. I've attached photos of one. Please assume the other to be in a similar state. So how should I proceed? The lettering is all more or less intact. How do remove the grime safely? And what, if anything, can be done about the rust? I have read one recommendation that one use a *dry* cloth only. But I think perhaps these are too soiled for that. And then, what can be done to arrest continued deterioration? I also have a question about filter caps (should that be another thread?). My intention years ago was to simply detach the cans and install good quality axials underneath. But these have become a bit more scarce now. Maybe it's a not a good idea in terms of value retention. What would you do if these were yours?* Thanks for all suggestions, comments and aid! * In most cases, it might be advisable to pretend you have less discretionary cash than you do.