I'm opposed to just jumping to clean anything, let alone something that may be of such historical significance. But, I'm also aware that we have a bit of an obligation to things we find. Corrosion is corrosion and it will continue. Even if it's in a very pretty display with a spotlight on it.
We need to at least care for the historically important items or get them to people who can and will. Trouble is, most cleaning methods can destroy. So, we need to proceed cautiously. The object is to get the piece in as nice condition as possible and then, somehow, seal the item so it can be enjoyed for generations to come.
Pieces that are really rare, need the touch of someone who is extremely familiar with the procedure of restoration. Many, here, know how to "clean" items very, very well. But, I dare say, there are only a few who know the complete cycle. The finishing, sealing one.
Just my take on the whole cleaning scenario. Good luck on the process.