Thought it was interesting, when dealer was evaluating my trade, he asked specifically about rust on the frame ( a way to lower the trade value) . When I did the PDI on my new 2015 TT and pointed out a few rust spots, he said all RV's will have some rust, it's unavoidable. I am sure if I left them untreated, they would reduce the value when I trade it.
2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 65W solar panels