I've made it a habit of photgraphing my models when competed, then when it starts looking long in the tooth, stripping the weapons, interiors, and other useful parts, then waste-canning the rest. I've found about 10-15 years shelf life is about all they'll last. It sucks to toss out all that work, but it keeps my display case filled with good looking stuff, and making room for the newer, better built things.
Doug