I noticed this weekend that I have a lot of rust on the support structure under the 3rd row seat. It extends down and appears to be on some of the other components as well. I dropped off my car at the SC today for an unrelated FWD issue and pointed this out. It was the first time they had seen it. We went and looked at another Signature and it had it as well - not as bad, but definitely there. By comparison, we found a production model that was completely clean and appeared to have a different coating or substance on the metal, and rust was either inhibited or never introduced. Coming from the aircraft world, rust/corrosion is a big deal. This is only going to get worse. I'm curious if other owners have this issue and what you would suggest? At the very minimum, I want to have all the defective components replaced.