Ron,
I deeply empathize with your storage issues. However, I have two major concerns about subjecting your metal objects, rusty or not, to likely flooding:
1. Continued deterioration of your metal artifacts due to rusting
2. The fact that flood water is never clean or pure, which means your metal objects would be exposed to a variety of contaminants--possibly dangerous for both your artifacts and anyone handling them
My worry is that you would essentially be committing to sacrificing these objects for the sake of the paper objects. However, if the space situation is this desperate, yes, the metal would definitely survive a flood better than paper.
The only possible safe option might be if the objects are small enough to store in sealable plastic tubs.
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Diana Staresinic-Deane
Executive Director
Old Depot Museum/Franklin County Historical Society
Ottawa KS
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