I have a 2010 (60) plate i30 hatchback comfort model. Noticed yesterday rust on both rear doors at the top under the rubber seal. 3 spots on offside door and 1 spot on nearside. I'm 100% sure Hyundai UK will claim it's not covered by warranty so I'm not even bothering with them. I live 26 miles from the coast so it's not corrosion caused by sea air. So I will have to find a body shop to repair (at my cost) really disappointed that a 6 year old car is rusty,and that I'm not a one off. To me it looks like it's a Hyundai Fault.