OS, anti-virus, firewall reinstalled and updated, advised client to reinstall rest of software himself.
OK, went and pulled the tank out of storage. Little rustier than I remembered. I don't have access to bead blasting cabinet here at my home, but I can hit it with a wire wheel tonight and see how thin the metal is. The inside has the usual crude and will need to be boiled out over the coals.
Morris, you can have it for the cost of shipping + a few beer tokens for my trouble.
You can decide when I report back after it meets the wire wheel.