Bruce
TVWBB 2-Star Olympian
What happens is the rust starts in the bottom and just creeps up the sides and in the places where they contact each other....those "seams" where the connect hold all that dirt, dust and gunk and therefore moisture and it is just a breeding ground for corrosion which migrates like cancer. Having to grind down, sand and prime and paint all that is just not worth it in my mind, even if the rust is just surface rust.