It bothers me too that a 1yr old MH shows signs of rust.. My under carriage shows signs of rust. That said I have an entry level Thor. Not that it makes it more acceptable, but I am a little surprised to see the same sort of thing on a 2013 FW DP. So basically no matter what you buy, since the chassis’ are all made the same, you end up with rust despite what you spend. The naive me always wanted to believe you get rust proofing and those sorts of things if you spend more money. Guess not.