B&B Tri-flow exhaust rust

[JGM3E3632]

I have had this exhaust for about 7 months now, it sounds great and performs well. The only problem is that it is already starting to show signs of rust. I'm going to get in touch with bavauto or B&B. The exhaust has a limited lifetime warranty, hopefully I won't get the "run around". I would think the exhaust would go a hell of a lot longer than 7 months before starting to rust. I live in the south, so in winter we never have snow. So we never have salt on the road. I guess it is jsut craping craftsmanship.