I carefully check over the used parts hoping to find any that are definately wrecked, which go into the scrap bucket. The rest I clean and store... When I get a chance I take the valves with me when visiting a friend at a shop and reface them. It's good to have the spares ready to go. Of course I store way too much junk, but someone's got to love it.

I have enough generators to last several centuries I imagine.