Michigan humidity is a killer, know from experience. Once tried to make a temporary garage with 2x4s, plywood, and opaque plastic sheeting and parked a restored car in it over the winter. It turned into this horrible green house like aging chamber, especially when the snow started melting. Rust all over the car.
Basements and inside the house are way better for storage. If you could completely seal it in a plastic bag, air tight, with a bunch of desiccant in the bag, that would work pretty well I suppose for humid environments.
Last edited by Paul Bell; Tue Dec 29 2015 10:58 AM.