QUOTE (Hooves @ Jun 19 2008, 09:07 PM)

Seems like mixed responses on the rust, it would be nice to have a definitive answer with some examples to back it up. The concertina on the ship: do we know how often it was played, it may have had many voyages snug in its box.
Be honest - could you spend several months cooped up in a ship with no other entertainment, and have a concertina in your sea-chest, and NOT play it frequently? I couldn't!
QUOTE
I'm going to guess it really depends on where you are, and how much exposure the tina gets. Would a humid apartment or pub also be conductive to corrosion?
The youngsters in accordion clubs hereabouts (southern Germany, a long way from salt water!) are discouraged from taking their accordions to barbecues. The bad scenario is that you play outside until it gets too chilly, and then you move into the house and keep playing. Your reeds have been liberally supplied with cool, dry air, and the moisture in the warmer inside air immediately condenses on the cold reeds. (Like on your glasses when you go from the cold street into a warm shop or pub.)
That's why portable instruments should be carried in insulated cases or gig-bags, and allowed to acclimatise to the new surroundings before playing. It's not so much the environment as the sudden change in environment that could be detrimental. The same rule applies to stringed instruments, but for different reasons.
Cheers,
John